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应用生态学报 ›› 2000, Vol. ›› Issue (3): 360-364.

• 研究论文 • 上一篇    下一篇

小麦-玉米轮作长期肥料定位试验中土壤磷库的变化Ⅰ.磷肥产量效应及土壤总磷库、无机磷库的变化

刘建玲, 张福锁   

  1. 中国农业大学植物营养系, 北京100094
  • 收稿日期:1999-04-02 修回日期:1999-10-14 出版日期:2000-05-25
  • 通讯作者: 刘建玲,女,1962年生,博士,教授,主要从事植物营养及施肥的生态效应研究,发表论文15篇.E-mail:Jianling@bd-user.he.cninfo.net
  • 基金资助:
    国家自然科学基金重大项目(3970100);河北省自然科学基金(397141)资助项目

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

LIU Jianling, ZHANG Fusuo   

  1. China Agricultural University, Beijing 100094
  • Received:1999-04-02 Revised:1999-10-14 Online:2000-05-25

摘要: 研究了冬小麦-夏玉米→春玉米轮作中,长期施用磷肥、有机肥对土壤总磷库、无机磷库的影响及磷肥的产量效应.结果表明,长期施用磷肥、有机肥土壤全磷、总无机磷均有不同程度的积累,土壤磷素的积累以无机磷为主.根据土壤磷素的收支平衡状况,计算出维持土壤磷素收支平衡磷肥的临界用量:冬小麦-夏玉米种植年份为P2O594.7kg·hm-2,春玉米种植年份为P2O551.5kg·hm-2.根据肥料效应函数计算出磷肥(P2O5)的经济最佳、最高产量用量分别为:冬小麦-夏玉米种植年份为135.8、149.8kg·hm-2,春玉米种植年份为88.6、95.9kg·hm-2.

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.