2010•Unpublished venueRequires access
Effect of long term fertilization on soil fertility and crop yield in a Udic Mollisol
Xiaozeng Han, Song Chun, Wang FengXian, Fengju Wang, Wenxiu Zou, Robert John Gilkes, Nattaporn Prakongkep
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Abstract
A six8year field trial was conducted to study the effects of fertilization on fertility characteristics and crop yield in a Udic Mollisol. Maize and soybean grown in a rotation, and which had received no fertilizer (CK), chemical N, P and K fertilizers (NPK), chemical N, P and K fertilizers plus a low quantity of pig manure (NPM+LOM), and chemical N, P and K fertilizers plus a high quantity of pig manure (NPM+HOM).Results indicated that soil fertility characteristics after six years cultivation, including the content of soil organic matter, the concentrations of soil total N, total P, available N, available P and available K, the percentage of soil water stable aggregates of more than 0.25mm, and the yields of maize and soybean during rotation were in the order of NPK+HOM> NPK+LOM> NPK> CK. The study concluded that annual organic manure and chemical fertilizer combined application could improve Mollisol fertility characteristics and increase crop yields.