تأثیر کود فسفر بر جذب روی در برخی از خاکهای آهکی ایران

نوع مقاله: مقاله پژوهشی

نویسنده

دانشکده کشاورزی دانشگاه تبریز

چکیده

به منظور بررسی تأثیر مصرف فسفر بر هم دماهای حذب روی، ده سری خاک واقع در استان تهران مشخص شدند. از هر
سری یک نمونه مرکب تهیه شد. خاکها با کود فسفر مخلوط شده و در رطوبت ظرفیت مزرعه ای به مدت دو هفته در دمای
۲۵ خوابانیده شدند. سطوح فسفر شامل ۱۰۰ ، ۰ و ۱۰۰۰ میلی گرم فسفر بر کیلوگرم خاک و سطوح روی از ۱ تا ۱۶۰ ±۱ºC
شکل را تغییر دهد. L میلی گرم روی بر لیتر متغیر بودند. سطح فسفر مصرفی نتوانست نوع همدمای جذب روی، از نوع
نتایج تجزیه واریانس مقدار جذب روی در خاکهای مورد مطالعه نشان داد که سطح فسفر مصرفی تأثیر معنی دار بر میانگین
اما روند تغییرات دادههای جذب دلالت بر کاهش جذب روی با افزایش سطح مصرف (p=۰/ مقدار جذب روی نگذاشت ( ۱۵۶
فسفر داشت. در بیشتر خاکها، مصرف فسفر ثابتهای معادله فروندلیچ را کاهش داد. فسفر در سطح ۱۰۰ میلی گرم فسفر بر
پارامترهای معادله دو مکانی لانگ موئیر را افزایش و در سطح ۱۰۰۰ میلیگرم فسفر بر کیلوگرم ، b1 + b کیلوگرم مجموع 2
پارامترهای مذکور را کاهش داد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Effect of Phosphorous Fertilization on Zinc Sorption in Some Calcareous Soils From Iran

نویسنده [English]

  • A Reyhanitabar
چکیده [English]

In this study phosphorous fertilization effect on Zn sorption was investigated. Ten composite samples
(each from one soil series) located at Tehran province were collected and mixed with P-fertilizer
(KH2PO4) and incubated for two weeks at 25 ºC ± 1. Added phosphorous levels were 0,100 and 1000
mgPkg-1 and Zn levels ranged from 1 to 160 mgZn L-1. Phosphorous did not change the L –type zinc
isotherm. Analysis of variance indicated that applying phosphorous to the soils at various levels
showed no significant effect (p=0.156) on zinc sorption. With increasing applied phosphorous, zinc
sorption slightly reduced which was not significant. In most of the soil series, phosphorous reduced
Freundlich isotherm constants. Phosphorous at low level, namely 100 mg P kg-1, increased the two
surface Langmuir sorption maxima b1 + b2. At 1000 mg P kg-1 level, the afore-mentioned constants
were reduced.

کلیدواژه‌ها [English]

  • Calcareous soils
  • Freundlich equation
  • Langmuir equation
  • Phosphorous
  • Zinc
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