| 小麦—玉米轮作长期肥料定位试验中土壤磷库的变化：Ⅰ.磷肥产？… |
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| 关 键 词： | 磷肥效应 土壤磷库 长期定位试验 轮作 |
Dynamics of soil P pool in a long-term fertilizing experiment of wheat-maize rotation. I. Crop yield effect of fertilizer P and dynamics of soil total P and inorganic P] |
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| Authors: | J Liu F Zhang |
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| Institution: | China Agricultural University, Beijing 100094. Jianling@bd-user.he.cninfo.net |
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| Abstract: | The effects of long-term applying fertilizer P and manure on the pools of soil total P and inorganic P and the crop yield in rotation of winter wheat-summer maize-->spring maize were studied. The results showed that the pool of soil total P and inorganic P were increased by applying fertilizer P and manure, and the phosphorus mostly accumulated in soil was inorganic P. The critical amounts of fertilizer P (P2O5) for balancing soil P were 94.7 kg.hm-2 to winter wheat-summer maize and 51.5 kg.hm-2 to spring maize. Based on regression equations, the application rates of fertilizer P (P2O5) for economic optimum and highest yields were 135.8 and 149.8 kg.hm-2 to winter wheat-summer maize, and 88.6 and 95.9 kg.hm-2 to spring maize, respectively. |
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