Vol. 9 (2) : March-April 2018 issue
Green Farming Vol. 9 (2) : 261-269 ; March-April, 2018
Relationship of organic and inorganic fertilization with soil fertility and crop yield under maize-wheat cropping system
ASMATULLAH DURANIb1*, B.S. BRARa2, KHUWAJA SAFIULLAHb3, AMINULLAH YOUSAFZAIc4 and HASHMATULLAH DURRANIb5
1Asstt. Professor *(dorani_2000@yahoo.com), 2Sr. Soil Scientist, 3,4,5Asstt. Professor
Designation : aDepartment of Soil Science, Punjab Agriculture University, Ludhiana - 140 004 (Punjab),
bDepartment of Soil Science & Agricultural Chemistry, NMCA, Navsari Agric. Univesity, Navsari - 396 450 (Gujrat),
cDepartment of Horticulture, Faculty of Agriculture, Nangarhar University, Nangarhar, Afghanistan
Subject : Soil Science & Agric. Chemistry; Soil Health & Soil Conservation Engg.
Paper No. : P-7166
Total Pages : 9
Received : 05 February 2018
Revised accepted : 22 March 2018
First Page
Citation :
ASMATULLAH DURANI, B.S. BRAR, KHUWAJA SAFIULLAH, AMINULLAH YOUSAFZAI and HASHMATULLAH DURRANI. 2018. Relationship of organic and inorganic fertilization with soil fertility and crop yield under maize-wheat cropping system. Green Farming Vol. 9 (2) : 261-269 ; March-April, 2018
ABSTRACT
Effect of long-term use of organic and inorganic fertilizers on nitrogen forms were studied under maize-wheat (41 years) cropping systems by conducting both field and laboratory studies. Soil pH decreased with the continuous application of inorganic fertilizers and organic manure under maize-wheat cropping system. Soil pH decreased however, SOC, available N, available P and available K improved with continuous application of organic and inorganic fertilizers under maize-wheat and systems. Continuous application of inorganic fertilizers, alone or in combination with organic manure led to marked increase in the total soil N, total hydrolysable- N (THN) (amino acid-N, ammonia-N, amino sugar-N, hydrolysable unknown-N) and non-hydrolysable-N. The effect of FYM with 100% NPK in maize-wheat was more pronounced in increasing the total soil N and THN. Maximum grain, straw yield and N, P, K uptake in the maize-wheat cropping systems were observed with an application of 100% NPK+FYM. Soil organic carbon and EC correlated significantly and positively with different fractions of N and pH correlated negatively and significantly with these fractions. Maximum grain, straw yield and N, P and K uptake in the both maize-wheat cropping systems were observed with an application of 100% NPK+FYM. Total hydrolysable N, ammonia-N, amino acid N, amino sugar N, non-hydrolysable N and hydrolysable unknown nitrogen were correlated significantly and positively with the grain yield and N uptake by maize, under maize-wheat cropping systems. The fraction of N correlated significantly and positively with soil organic carbon and negatively significant with soil pH.
Key words :
Maize-wheat cropping systems, N fractions, Organic and inorganic fertilization, Soil fertility, Yield.