Zheng Jianying,Wu Ruijun,Zhai Lianning.Impact of Long-term Fertilization on Crop Yield and Aasorbing N. P of Crop in Slope Land[J].Research of Soil and Water Conservation,1996,3(02):13-17.
坡耕地长期施肥对作物产量及吸N、P量的影响
- Title:
- Impact of Long-term Fertilization on Crop Yield and Aasorbing N. P of Crop in Slope Land
- 摘要:
- 坡耕地12年长期施肥结果表明：产量对长期施肥反映明显，施氮肥效果不显着，施磷肥效果较好，NP配合效果更佳，有机肥与N或NP配施，可大幅度提高产量。在长期施肥水平较低情况下，随着施肥时间的延长，轮作周期内产量、作物吸N、P量均呈递减趋势，可用y=a+blogt方程拟合，其参数b均为负值，b值的大小，反映出不同肥料对土壤肥力衰减程度。施N处理作物吸N量与吸P量相当，说明土壤中缺P素，严重限制了作物对磷的吸收。表明在P素极缺的黄绵土上，增施磷肥的重要性。
- Abstract:
- The results of 12 years long-term applying fertilizer in slope farmland show the longterm applying fertilizer effect on yield is very obvious,effect of applying N is not obvious,effects of applying P is better,and organic matter mixed N or NP may enhance crop yield obviously.As applying fertilizer’s time goes on,crop yield and absorbing N、P are reduced step by step as lower applying-fertilizer level in a rotation period of crops, this reducing tendency may be fitted by y=a+blogt, these paramere b values become negative number, b values affect soil nutrient declining situation as different fertilizer as well.That absorbing N level is corresponded to absorbing P of crop as applying N, show soil lacked P prevents crop absorbing P from soil, as proved P fertilizer should be increased in loess soil.
参考文献/References:
[1] 郑剑英, 赵更生等.黄绵土在连续施肥下的肥料效应.水土保持通报, 1990. (2)
[2] 郑剑英, 赵更生等.黄绵土长期施肥后效及对土壤养分的影响.水土保持学报, 1994. (2)
[3] 郑剑英.不同肥力黄绵土在施肥条件下的土壤供N, P能力和N, P肥效应.水土保持学报, 1994. (4)
[4] 赵更生, 郑剑英, 吴瑞俊.陕北黄土丘陵区土壤中物质循环与粮食生产关系的研究.水土保持学报, 1993. (1)
[5] 李世清, 李生秀.水肥配合对玉米产量和肥料效果的影响.干旱地区农业研究, 1994. (1)
[6] 李生秀, 赵伯善.有机肥料与化肥的合理配合.干旱地区农业研究, 1993(增刊)
[7] 吕家珑, 李祖荫.旱地土壤培肥研究.西北农业大学学报, 1993(增刊)
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备注/Memo
收稿日期:1995-11-10;改回日期:。