Journal of Water and Soil Science
علوم آب و خاک
jwss
Agriculture
http://jstnar.iut.ac.ir
0
user
2476-3594
2476-5554
10.47176/jwss
fa
jalali
1393
6
1
gregorian
2014
9
1
18
68
online
1
fulltext
fa
تأثیر حرارت روی آبگریزی و برخی از خصوصیات فیزیکی و شیمیایی خاک
Heating Effects on Water Repellency and Some Physical and Chemical Properties of Soil
عمومی
Ggeneral
پژوهشي
Research
<a name="OLE_LINK8"></a><a name="OLE_LINK1"><b><span style="FONT-FAMILY: Lotus COLOR: black FONT-SIZE: 11pt mso-fareast-font-family: 'Times New Roman' mso-bidi-language: FA mso-ansi-font-size: 9.0pt mso-ansi-language: EN-US mso-fareast-language: EN-US mso-ascii-font-family: 'Times New Roman' mso-hansi-font-family: 'Times New Roman' mso-no-proof: yes" dir="rtl" lang="FA"><span style="mso-bookmark: OLE_LINK8"><font size="3" face="Lotus">عموماً خاکهای خشک بهراحتی آب را جذب میکنند. اما در همه خاکها این خصوصیت دیده نمیشود. بعضی از خاکها (خاکهای آبگریز) در برابر مرطوب شدن از خود مقاومت نشان میدهند. </font></span></span><span style="mso-bookmark: OLE_LINK8"><span style="FONT-FAMILY: Lotus COLOR: black FONT-SIZE: 11pt mso-fareast-font-family: 'Times New Roman' mso-bidi-language: AR-SA mso-ansi-font-size: 9.0pt mso-ansi-language: EN-US mso-fareast-language: EN-US mso-ascii-font-family: 'Times New Roman' mso-hansi-font-family: 'Times New Roman' mso-no-proof: yes" dir="rtl" lang="AR-SA">با</span><span dir="ltr"></span><span style="FONT-FAMILY: "Times New Roman","serif" COLOR: black FONT-SIZE: 9pt mso-bidi-font-family: Lotus mso-fareast-font-family: 'Times New Roman' mso-bidi-language: AR-SA mso-bidi-font-size: 11.0pt mso-ansi-language: EN-US mso-fareast-language: EN-US mso-no-proof: yes" lang="AR-SA"><span dir="ltr"></span> </span><span style="FONT-FAMILY: Lotus COLOR: black FONT-SIZE: 11pt mso-fareast-font-family: 'Times New Roman' mso-bidi-language: AR-SA mso-ansi-font-size: 9.0pt mso-ansi-language: EN-US mso-fareast-language: EN-US mso-ascii-font-family: 'Times New Roman' mso-hansi-font-family: 'Times New Roman' mso-no-proof: yes" dir="rtl" lang="AR-SA">توجه </span><span style="FONT-FAMILY: Lotus COLOR: black FONT-SIZE: 11pt mso-fareast-font-family: 'Times New Roman' mso-bidi-language: FA mso-ansi-font-size: 9.0pt mso-ansi-language: EN-US mso-fareast-language: EN-US mso-ascii-font-family: 'Times New Roman' mso-hansi-font-family: 'Times New Roman' mso-no-proof: yes" dir="rtl" lang="FA">بهاهمیت موضوع و </span><span style="FONT-FAMILY: Lotus COLOR: black FONT-SIZE: 11pt mso-fareast-font-family: 'Times New Roman' mso-bidi-language: AR-SA mso-ansi-font-size: 9.0pt mso-ansi-language: EN-US mso-fareast-language: EN-US mso-ascii-font-family: 'Times New Roman' mso-hansi-font-family: 'Times New Roman' mso-no-proof: yes" dir="rtl" lang="AR-SA">مطالعات</span><span dir="ltr"></span><span style="FONT-FAMILY: "Times New Roman","serif" COLOR: black FONT-SIZE: 9pt mso-bidi-font-family: Lotus mso-fareast-font-family: 'Times New Roman' mso-bidi-language: AR-SA mso-bidi-font-size: 11.0pt mso-ansi-language: EN-US mso-fareast-language: EN-US mso-no-proof: yes" lang="AR-SA"><span dir="ltr"></span> </span><span style="FONT-FAMILY: Lotus COLOR: black FONT-SIZE: 11pt mso-fareast-font-family: 'Times New Roman' mso-bidi-language: AR-SA mso-ansi-font-size: 9.0pt mso-ansi-language: EN-US mso-fareast-language: EN-US mso-ascii-font-family: 'Times New Roman' mso-hansi-font-family: 'Times New Roman' mso-no-proof: yes" dir="rtl" lang="AR-SA">کم صورت</span><span dir="ltr"></span><span style="FONT-FAMILY: "Times New Roman","serif" COLOR: black FONT-SIZE: 9pt mso-bidi-font-family: Lotus mso-fareast-font-family: 'Times New Roman' mso-bidi-language: AR-SA mso-bidi-font-size: 11.0pt mso-ansi-language: EN-US mso-fareast-language: EN-US mso-no-proof: yes" lang="AR-SA"><span dir="ltr"></span> </span><span style="FONT-FAMILY: Lotus COLOR: black FONT-SIZE: 11pt mso-fareast-font-family: 'Times New Roman' mso-bidi-language: AR-SA mso-ansi-font-size: 9.0pt mso-ansi-language: EN-US mso-fareast-language: EN-US mso-ascii-font-family: 'Times New Roman' mso-hansi-font-family: 'Times New Roman' mso-no-proof: yes" dir="rtl" lang="AR-SA">گرفته</span><span dir="ltr"></span><span style="FONT-FAMILY: "Times New Roman","serif" COLOR: black FONT-SIZE: 9pt mso-bidi-font-family: Lotus mso-fareast-font-family: 'Times New Roman' mso-bidi-language: AR-SA mso-bidi-font-size: 11.0pt mso-ansi-language: EN-US mso-fareast-language: EN-US mso-no-proof: yes" lang="AR-SA"><span dir="ltr"></span> </span><span style="FONT-FAMILY: Lotus COLOR: black FONT-SIZE: 11pt mso-fareast-font-family: 'Times New Roman' mso-bidi-language: AR-SA mso-ansi-font-size: 9.0pt mso-ansi-language: EN-US mso-fareast-language: EN-US mso-ascii-font-family: 'Times New Roman' mso-hansi-font-family: 'Times New Roman' mso-no-proof: yes" dir="rtl" lang="AR-SA">در</span><span dir="ltr"></span><span style="FONT-FAMILY: "Times New Roman","serif" COLOR: black FONT-SIZE: 9pt mso-bidi-font-family: Lotus mso-fareast-font-family: 'Times New Roman' mso-bidi-language: AR-SA mso-bidi-font-size: 11.0pt mso-ansi-language: EN-US mso-fareast-language: EN-US mso-no-proof: yes" lang="AR-SA"><span dir="ltr"></span> </span><span style="FONT-FAMILY: Lotus COLOR: black FONT-SIZE: 11pt mso-fareast-font-family: 'Times New Roman' mso-bidi-language: AR-SA mso-ansi-font-size: 9.0pt mso-ansi-language: EN-US mso-fareast-language: EN-US mso-ascii-font-family: 'Times New Roman' mso-hansi-font-family: 'Times New Roman' mso-no-proof: yes" dir="rtl" lang="AR-SA">زمینه آبگریزی</span><span dir="ltr"></span><span style="FONT-FAMILY: "Times New Roman","serif" COLOR: black FONT-SIZE: 9pt mso-bidi-font-family: Lotus mso-fareast-font-family: 'Times New Roman' mso-bidi-language: AR-SA mso-bidi-font-size: 11.0pt mso-ansi-language: EN-US mso-fareast-language: EN-US mso-no-proof: yes" lang="AR-SA"><span dir="ltr"></span> </span><span style="FONT-FAMILY: Lotus COLOR: black FONT-SIZE: 11pt mso-fareast-font-family: 'Times New Roman' mso-bidi-language: AR-SA mso-ansi-font-size: 9.0pt mso-ansi-language: EN-US mso-fareast-language: EN-US mso-ascii-font-family: 'Times New Roman' mso-hansi-font-family: 'Times New Roman' mso-no-proof: yes" dir="rtl" lang="AR-SA">خاک،</span><span dir="ltr"></span><span style="FONT-FAMILY: "Times New Roman","serif" COLOR: black FONT-SIZE: 9pt mso-bidi-font-family: Lotus mso-fareast-font-family: 'Times New Roman' mso-bidi-language: AR-SA mso-bidi-font-size: 11.0pt mso-ansi-language: EN-US mso-fareast-language: EN-US mso-no-proof: yes" lang="AR-SA"><span dir="ltr"></span> </span><span style="FONT-FAMILY: Lotus COLOR: black FONT-SIZE: 11pt mso-fareast-font-family: 'Times New Roman' mso-bidi-language: AR-SA mso-ansi-font-size: 9.0pt mso-ansi-language: EN-US mso-fareast-language: EN-US mso-ascii-font-family: 'Times New Roman' mso-hansi-font-family: 'Times New Roman' mso-no-proof: yes" dir="rtl" lang="AR-SA">هدف</span><span dir="ltr"></span><span style="FONT-FAMILY: "Times New Roman","serif" COLOR: black FONT-SIZE: 9pt mso-bidi-font-family: Lotus mso-fareast-font-family: 'Times New Roman' mso-bidi-language: AR-SA mso-bidi-font-size: 11.0pt mso-ansi-language: EN-US mso-fareast-language: EN-US mso-no-proof: yes" lang="AR-SA"><span dir="ltr"></span> </span><span style="FONT-FAMILY: Lotus COLOR: black FONT-SIZE: 11pt mso-fareast-font-family: 'Times New Roman' mso-bidi-language: AR-SA mso-ansi-font-size: 9.0pt mso-ansi-language: EN-US mso-fareast-language: EN-US mso-ascii-font-family: 'Times New Roman' mso-hansi-font-family: 'Times New Roman' mso-no-proof: yes" dir="rtl" lang="AR-SA">از</span><span dir="ltr"></span><span style="FONT-FAMILY: "Times New Roman","serif" COLOR: black FONT-SIZE: 9pt mso-bidi-font-family: Lotus mso-fareast-font-family: 'Times New Roman' mso-bidi-language: AR-SA mso-bidi-font-size: 11.0pt mso-ansi-language: EN-US mso-fareast-language: EN-US mso-no-proof: yes" lang="AR-SA"><span dir="ltr"></span> </span><span style="FONT-FAMILY: Lotus COLOR: black FONT-SIZE: 11pt mso-fareast-font-family: 'Times New Roman' mso-bidi-language: AR-SA mso-ansi-font-size: 9.0pt mso-ansi-language: EN-US mso-fareast-language: EN-US mso-ascii-font-family: 'Times New Roman' mso-hansi-font-family: 'Times New Roman' mso-no-proof: yes" dir="rtl" lang="AR-SA">تحقیق حاضر</span><span dir="ltr"></span><span style="FONT-FAMILY: "Times New Roman","serif" COLOR: black FONT-SIZE: 9pt mso-bidi-font-family: Lotus mso-fareast-font-family: 'Times New Roman' mso-bidi-language: AR-SA mso-bidi-font-size: 11.0pt mso-ansi-language: EN-US mso-fareast-language: EN-US mso-no-proof: yes" lang="AR-SA"><span dir="ltr"></span> </span><span style="FONT-FAMILY: Lotus COLOR: black FONT-SIZE: 11pt mso-fareast-font-family: 'Times New Roman' mso-bidi-language: AR-SA mso-ansi-font-size: 9.0pt mso-ansi-language: EN-US mso-fareast-language: EN-US mso-ascii-font-family: 'Times New Roman' mso-hansi-font-family: 'Times New Roman' mso-no-proof: yes" dir="rtl" lang="AR-SA">بررسی</span><span dir="ltr"></span><span style="FONT-FAMILY: "Times New Roman","serif" COLOR: black FONT-SIZE: 9pt mso-bidi-font-family: Lotus mso-fareast-font-family: 'Times New Roman' mso-bidi-language: AR-SA mso-bidi-font-size: 11.0pt mso-ansi-language: EN-US mso-fareast-language: EN-US mso-no-proof: yes" lang="AR-SA"><span dir="ltr"></span> </span><span style="FONT-FAMILY: Lotus COLOR: black FONT-SIZE: 11pt mso-fareast-font-family: 'Times New Roman' mso-bidi-language: AR-SA mso-ansi-font-size: 9.0pt mso-ansi-language: EN-US mso-fareast-language: EN-US mso-ascii-font-family: 'Times New Roman' mso-hansi-font-family: 'Times New Roman' mso-no-proof: yes" dir="rtl" lang="AR-SA">تأثیر</span><span dir="ltr"></span><span style="FONT-FAMILY: "Times New Roman","serif" COLOR: black FONT-SIZE: 9pt mso-bidi-font-family: Lotus mso-fareast-font-family: 'Times New Roman' mso-bidi-language: AR-SA mso-bidi-font-size: 11.0pt mso-ansi-language: EN-US mso-fareast-language: EN-US mso-no-proof: yes" lang="AR-SA"><span dir="ltr"></span> </span><span style="FONT-FAMILY: Lotus COLOR: black FONT-SIZE: 11pt mso-fareast-font-family: 'Times New Roman' mso-bidi-language: AR-SA mso-ansi-font-size: 9.0pt mso-ansi-language: EN-US mso-fareast-language: EN-US mso-ascii-font-family: 'Times New Roman' mso-hansi-font-family: 'Times New Roman' mso-no-proof: yes" dir="rtl" lang="AR-SA">حرارت</span><span dir="ltr"></span><span style="FONT-FAMILY: "Times New Roman","serif" COLOR: black FONT-SIZE: 9pt mso-bidi-font-family: Lotus mso-fareast-font-family: 'Times New Roman' mso-bidi-language: AR-SA mso-bidi-font-size: 11.0pt mso-ansi-language: EN-US mso-fareast-language: EN-US mso-no-proof: yes" lang="AR-SA"><span dir="ltr"></span> </span><span style="FONT-FAMILY: Lotus COLOR: black FONT-SIZE: 11pt mso-fareast-font-family: 'Times New Roman' mso-bidi-language: AR-SA mso-ansi-font-size: 9.0pt mso-ansi-language: EN-US mso-fareast-language: EN-US mso-ascii-font-family: 'Times New Roman' mso-hansi-font-family: 'Times New Roman' mso-no-proof: yes" dir="rtl" lang="AR-SA">بر آبگریزی</span><span dir="ltr"></span><span style="FONT-FAMILY: "Times New Roman","serif" COLOR: black FONT-SIZE: 9pt mso-bidi-font-family: Lotus mso-fareast-font-family: 'Times New Roman' mso-bidi-language: AR-SA mso-bidi-font-size: 11.0pt mso-ansi-language: EN-US mso-fareast-language: EN-US mso-no-proof: yes" lang="AR-SA"><span dir="ltr"></span> </span><span style="FONT-FAMILY: Lotus COLOR: black FONT-SIZE: 11pt mso-fareast-font-family: 'Times New Roman' mso-bidi-language: AR-SA mso-ansi-font-size: 9.0pt mso-ansi-language: EN-US mso-fareast-language: EN-US mso-ascii-font-family: 'Times New Roman' mso-hansi-font-family: 'Times New Roman' mso-no-proof: yes" dir="rtl" lang="AR-SA">و برخی</span><span dir="ltr"></span><span style="FONT-FAMILY: "Times New Roman","serif" COLOR: black FONT-SIZE: 9pt mso-bidi-font-family: Lotus mso-fareast-font-family: 'Times New Roman' mso-bidi-language: AR-SA mso-bidi-font-size: 11.0pt mso-ansi-language: EN-US mso-fareast-language: EN-US mso-no-proof: yes" lang="AR-SA"><span dir="ltr"></span> </span><span style="FONT-FAMILY: Lotus COLOR: black FONT-SIZE: 11pt mso-fareast-font-family: 'Times New Roman' mso-bidi-language: AR-SA mso-ansi-font-size: 9.0pt mso-ansi-language: EN-US mso-fareast-language: EN-US mso-ascii-font-family: 'Times New Roman' mso-hansi-font-family: 'Times New Roman' mso-no-proof: yes" dir="rtl" lang="AR-SA">از</span><span dir="ltr"></span><span style="FONT-FAMILY: "Times New Roman","serif" COLOR: black FONT-SIZE: 9pt mso-bidi-font-family: Lotus mso-fareast-font-family: 'Times New Roman' mso-bidi-language: AR-SA mso-bidi-font-size: 11.0pt mso-ansi-language: EN-US mso-fareast-language: EN-US mso-no-proof: yes" lang="AR-SA"><span dir="ltr"></span> </span><span style="FONT-FAMILY: Lotus COLOR: black FONT-SIZE: 11pt mso-fareast-font-family: 'Times New Roman' mso-bidi-language: AR-SA mso-ansi-font-size: 9.0pt mso-ansi-language: EN-US mso-fareast-language: EN-US mso-ascii-font-family: 'Times New Roman' mso-hansi-font-family: 'Times New Roman' mso-no-proof: yes" dir="rtl" lang="AR-SA">خصوصیات</span><span dir="ltr"></span><span style="FONT-FAMILY: "Times New Roman","serif" COLOR: black FONT-SIZE: 9pt mso-bidi-font-family: Lotus mso-fareast-font-family: 'Times New Roman' mso-bidi-language: AR-SA mso-bidi-font-size: 11.0pt mso-ansi-language: EN-US mso-fareast-language: EN-US mso-no-proof: yes" lang="AR-SA"><span dir="ltr"></span> </span><span style="FONT-FAMILY: Lotus COLOR: black FONT-SIZE: 11pt mso-fareast-font-family: 'Times New Roman' mso-bidi-language: AR-SA mso-ansi-font-size: 9.0pt mso-ansi-language: EN-US mso-fareast-language: EN-US mso-ascii-font-family: 'Times New Roman' mso-hansi-font-family: 'Times New Roman' mso-no-proof: yes" dir="rtl" lang="AR-SA">فیزیکی</span><span dir="ltr"></span><span style="FONT-FAMILY: "Times New Roman","serif" COLOR: black FONT-SIZE: 9pt mso-bidi-font-family: Lotus mso-fareast-font-family: 'Times New Roman' mso-bidi-language: AR-SA mso-bidi-font-size: 11.0pt mso-ansi-language: EN-US mso-fareast-language: EN-US mso-no-proof: yes" lang="AR-SA"><span dir="ltr"></span> </span><span style="FONT-FAMILY: Lotus COLOR: black FONT-SIZE: 11pt mso-fareast-font-family: 'Times New Roman' mso-bidi-language: AR-SA mso-ansi-font-size: 9.0pt mso-ansi-language: EN-US mso-fareast-language: EN-US mso-ascii-font-family: 'Times New Roman' mso-hansi-font-family: 'Times New Roman' mso-no-proof: yes" dir="rtl" lang="AR-SA">و شیمیایی خاک</span><span dir="ltr"></span><span style="FONT-FAMILY: "Times New Roman","serif" COLOR: black FONT-SIZE: 9pt mso-bidi-font-family: Lotus mso-fareast-font-family: 'Times New Roman' mso-bidi-language: AR-SA mso-bidi-font-size: 11.0pt mso-ansi-language: EN-US mso-fareast-language: EN-US mso-no-proof: yes" lang="AR-SA"><span dir="ltr"></span> </span><span style="FONT-FAMILY: Lotus COLOR: black FONT-SIZE: 11pt mso-fareast-font-family: 'Times New Roman' mso-bidi-language: AR-SA mso-ansi-font-size: 9.0pt mso-ansi-language: EN-US mso-fareast-language: EN-US mso-ascii-font-family: 'Times New Roman' mso-hansi-font-family: 'Times New Roman' mso-no-proof: yes" dir="rtl" lang="AR-SA">میباشد.</span></span></b></a><b><span style="FONT-FAMILY: Lotus COLOR: black FONT-SIZE: 11pt mso-fareast-font-family: 'Times New Roman' mso-bidi-language: AR-SA mso-ansi-font-size: 9.0pt mso-ansi-language: EN-US mso-fareast-language: EN-US mso-ascii-font-family: 'Times New Roman' mso-hansi-font-family: 'Times New Roman' mso-no-proof: yes" dir="rtl" lang="AR-SA"> به اینمنظور خاک اولیه پس از ترکیب با کمپوست در دماهای 100، 200، 300، 400 و 500 درجه سانتی</span><span style="FONT-FAMILY: "Times New Roman","serif" COLOR: black FONT-SIZE: 9pt mso-bidi-font-family: Lotus mso-fareast-font-family: 'Times New Roman' mso-bidi-language: AR-SA mso-bidi-font-size: 11.0pt mso-ansi-language: EN-US mso-fareast-language: EN-US mso-no-proof: yes"></span><span style="FONT-FAMILY: Lotus COLOR: black FONT-SIZE: 11pt mso-fareast-font-family: 'Times New Roman' mso-bidi-language: AR-SA mso-ansi-font-size: 9.0pt mso-ansi-language: EN-US mso-fareast-language: EN-US mso-ascii-font-family: 'Times New Roman' mso-hansi-font-family: 'Times New Roman' mso-no-proof: yes" dir="rtl" lang="AR-SA">گراد در آون یا کوره بهمدت 30 دقیقه حرارت داده شد</span><span dir="ltr"></span><span style="FONT-FAMILY: "Times New Roman","serif" COLOR: black FONT-SIZE: 9pt mso-bidi-font-family: Lotus mso-fareast-font-family: 'Times New Roman' mso-bidi-language: AR-SA mso-bidi-font-size: 11.0pt mso-ansi-language: EN-US mso-fareast-language: EN-US mso-no-proof: yes"><span dir="ltr"></span>.</span><span dir="rtl"></span><span style="FONT-FAMILY: Lotus COLOR: black FONT-SIZE: 11pt mso-fareast-font-family: 'Times New Roman' mso-bidi-language: AR-SA mso-ansi-font-size: 9.0pt mso-ansi-language: EN-US mso-fareast-language: EN-US mso-ascii-font-family: 'Times New Roman' mso-hansi-font-family: 'Times New Roman' mso-no-proof: yes" dir="rtl"><span dir="rtl"></span> </span><span style="FONT-FAMILY: Lotus COLOR: black FONT-SIZE: 11pt mso-fareast-font-family: 'Times New Roman' mso-bidi-language: FA mso-ansi-font-size: 9.0pt mso-ansi-language: EN-US mso-fareast-language: EN-US mso-ascii-font-family: 'Times New Roman' mso-hansi-font-family: 'Times New Roman' mso-no-proof: yes" dir="rtl" lang="FA">نتایج نشان داد که پس از انجام تستهای آبگریزی، تیمار شاهد (خاک اولیه- حرارت ندیده) و خاک حرارت دیده در دمای 300 درجه بهترتیب دارای زمان نفوذ قطره آب (</span><stockticker w:st="on"><span style="FONT-FAMILY: "Times New Roman","serif" COLOR: black FONT-SIZE: 9pt mso-bidi-font-family: Lotus mso-fareast-font-family: 'Times New Roman' mso-bidi-language: FA mso-bidi-font-size: 11.0pt mso-ansi-language: EN-US mso-fareast-language: EN-US mso-no-proof: yes">WDPT</span></stockticker><span dir="rtl"></span><span style="FONT-FAMILY: Lotus COLOR: black FONT-SIZE: 11pt mso-fareast-font-family: 'Times New Roman' mso-bidi-language: FA mso-ansi-font-size: 9.0pt mso-ansi-language: EN-US mso-fareast-language: EN-US mso-ascii-font-family: 'Times New Roman' mso-hansi-font-family: 'Times New Roman' mso-no-proof: yes" dir="rtl" lang="FA"><span dir="rtl"></span>) و درصد محلول اتانول (</span><stockticker w:st="on"><span style="FONT-FAMILY: "Times New Roman","serif" COLOR: black FONT-SIZE: 9pt mso-bidi-font-family: Lotus mso-fareast-font-family: 'Times New Roman' mso-bidi-language: FA mso-bidi-font-size: 11.0pt mso-ansi-language: EN-US mso-fareast-language: EN-US mso-no-proof: yes">MED</span></stockticker><span dir="rtl"></span><span style="FONT-FAMILY: Lotus COLOR: black FONT-SIZE: 11pt mso-fareast-font-family: 'Times New Roman' mso-bidi-language: FA mso-ansi-font-size: 9.0pt mso-ansi-language: EN-US mso-fareast-language: EN-US mso-ascii-font-family: 'Times New Roman' mso-hansi-font-family: 'Times New Roman' mso-no-proof: yes" dir="rtl" lang="FA"><span dir="rtl"></span>) برابر با <a name="OLE_LINK5">45 ثانیه و 17%، </a>80 ثانیه و 23% بودند</span><span dir="ltr"></span><span style="FONT-FAMILY: "Times New Roman","serif" COLOR: black FONT-SIZE: 9pt mso-bidi-font-family: Lotus mso-fareast-font-family: 'Times New Roman' mso-bidi-language: FA mso-bidi-font-size: 11.0pt mso-ansi-language: EN-US mso-fareast-language: EN-US mso-no-proof: yes"><span dir="ltr"></span>.</span><span dir="rtl"></span><span style="FONT-FAMILY: Lotus COLOR: black FONT-SIZE: 11pt mso-fareast-font-family: 'Times New Roman' mso-bidi-language: FA mso-ansi-font-size: 9.0pt mso-ansi-language: EN-US mso-fareast-language: EN-US mso-ascii-font-family: 'Times New Roman' mso-hansi-font-family: 'Times New Roman' mso-no-proof: yes" dir="rtl"><span dir="rtl"></span> <span lang="FA"><font size="3" face="Lotus">بهاین ترتیب خاک موردنظر در ابتدا دارای آبگریزی اندک بود و سپس با حرارت دادن در 300 درجه آبگریزی قوی در آن ایجاد شد و با بالاتر رفتن دما، ناگهان آبگریزی از بین رفت. بافت خاک نیز در اثر حرارت در دماهای بالا (400 و 500 درجه) تغییر کرد و از لومی به لوم شنی تبدیل شد. که علت آن همجوشی ذرات رسی و ایجاد ذراتی با اندازه شن میباشد. درصد ماده آلی نیز در تیمارهای مختلف با افزایش دما کاهش یافت. مقدار </font></span></span><span style="FONT-FAMILY: "Times New Roman","serif" COLOR: black FONT-SIZE: 9pt mso-bidi-font-family: Lotus mso-fareast-font-family: 'Times New Roman' mso-bidi-language: FA mso-bidi-font-size: 11.0pt mso-ansi-language: EN-US mso-fareast-language: EN-US mso-no-proof: yes">pH</span><span dir="rtl"></span><span style="FONT-FAMILY: Lotus COLOR: black FONT-SIZE: 11pt mso-fareast-font-family: 'Times New Roman' mso-bidi-language: FA mso-ansi-font-size: 9.0pt mso-ansi-language: EN-US mso-fareast-language: EN-US mso-ascii-font-family: 'Times New Roman' mso-hansi-font-family: 'Times New Roman' mso-no-proof: yes" dir="rtl"><span dir="rtl"></span> <span lang="FA"><font size="3" face="Lotus">عصاره اشباع نیز تا 200 درجه کاهش و پس از آن در تیمار 500 درجه بهدلیل افزایش خاکستر موجود در خاک، افزایش یافت. کاهش مواد آلی و معدنی و سوختن آنها در اثر حرارت موجب شد در تمام تیمارهای حرارتی با بالا رفتن دما هدایت الکتریکی عصاره اشباع خاک کاهش یابد. </font></span></span></b>
<span style="FONT-FAMILY: "Times New Roman","serif" FONT-SIZE: 10pt mso-fareast-font-family: 'Times New Roman' mso-bidi-language: FA mso-ansi-language: EN-US mso-fareast-language: EN-US">Usually, dry soil readily absorbs water .However, not all soils display such characteristics. Some soils (hydrophobic soils) show resistance to wetting. Because of the importance of this subject and lack of research, we evaluated the effect of heating on water repellency and some of soil physical and chemical characteristics. So soil was combined with compost and heated at deferent temperatures, 100, 200, 300, 400 and 500 °C for 30 minutes in an oven or muffle furnace. The results showed that control treatment and heated soil at 300 °C had WDPT and MED 45 (s), 17% and 80 (s), 23% respectively. So, little water repellency was present prior to heating the soil. When soil was heated up to 300°C, intense water repellency resulted, but it was abruptly eliminated by increasing the heating. The soil texture was changed from loam to sandy loam at high temperatures (400 & 500 °C) and the sand percentage was increased. Organic matter decreased by increasing the temperature. Amount of pH decreased up to 200 °C and then increased at 500°C because of increasing ash in soils. Diminution of mineral and organic matter caused EC to decline in all the heated soils.</span>
آبگریزی, بافت خاک, حرارت, خصوصیات فیزیکی و شیمیایی
Hydrophobic, Soil texture, Heating, Physical and Chemical properties.
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http://jstnar.iut.ac.ir/browse.php?a_code=A-10-1-12&slc_lang=fa&sid=1
N.
Nourmahnad
نگار
نورمهناد
negar_nourmahnad@yahoo.com