Nitrogen mineralization from various manures in saline and non-saline soils

الموضوعات

علوم بيئية

الملخص

A laboratory incubation experiment (for 12 weeks) was carried out to (1)determine accumulation of mineral nitrogen (NH4-N and NO3-N) duringdecomposition of five types of locally available manures (chicken manure,farm yard manure, pigeon manure, guano, and sewage sludge) and to (2)examine the relationship between N released from the manures with theirinitial chemical composition. Manures were evenly mixed with two types ofsoils (saline and non-saline) at a rate of 200 mg N kg-1 soil. The mixtureswere placed in polythene bags (25X10 cm) and incubated at ambient airtemperature and 80% of water holding capacity. Mineral N was monitoredafter 0, 2, 4, 6, 8, 10, and 12 weeks from incubation.Results showed that NO3-N was the dominant form of inorganic N in salinesoils for all manures and also, in non-saline soils with the exception ofsewage sludge and pigeon manure.The initial chemical composition is important in the release of N frommanure in both saline and non-saline soils. Net N released from the manurein the saline and non-saline soils was negatively correlated with initial Ncontent, C/N ratio and lignin (r2 = -0.837/-0.385, -0.719/-0.095, -0.448/ -0.903), respectively. Cellulose and hemi-cellulose in saline soils werepositively correlated with net N released (r2=0.558 and 0.613), however, innon-saline soils net N released was positively correlated with cellulose (r2 =0.899) and negatively with hemi-cellulose (r2 = -0.118).It could be concluded that monitoring mineral N release duringdecomposition of manures is a useful tool for fertilization programs thatinclude incorporation of organic sources of N.

روابط وملفات

التعريف والنوع

رقم الوثيقة

043d44e5-0cba-4d0e-9b27-3f7595d359b5

رقم العقد

0

نوع الوسائط

Crawler

نوع المحتوى

الرسائل العلمية

صيغة المصدر

رسائل ماجيستير

نوع الملف

pdf text

أسماء الملفات

1637583_1.pdf

بيانات النشر

ألقاب المؤلفين

[{"name_ar":"عبدالرحيم محمد","title_ar":"اعداد","title_en":"Preparation"},{"name_ar":"مبارك عبدالرحمن","title_ar":"اشراف","title_en":"Supervision"}]

اللغة

English

المصدر والدورية

اسم المصدر

Nitrogen mineralization from various manures in saline and non-saline soils

المحتوى والصفحات

عدد الصفحات

0

إشراف وإعداد

الإشراف

مبارك عبدالرحمن

الإعداد

عبدالرحيم محمد

الاقتباسات الببليوغرافية