2005•System Sciences and Comprehensive Studies in AgricultureRequires access
Effect of long-term fertilization on crop yield in black soil
Xilin Zhang
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Abstract
The research showed that the crop yield was decreased 8.2% in long-term no fertilization, and increased 9.6% and 31.6% in only application organic fertilizer and chemical fertilization respectively, and increased 43.0% in organic fertilizer combining chemical fertilizer after 24 years and 8 rotation cycle in black soil. The order of contribution rate of fertilization to crop yield were wheatcornsoybean. The order of contribution rate of different chemical fertilizer to crop yield were nitrogenphosphoruspotassium.