| 摘要: |
| 采用定位试验研究了不同肥料对小麦/玉米带田土壤肥力的影响及土壤培肥途径。结果证明:①带田不施肥时,肥力迅速降低,产量急剧减少;②在带田的产量构成中,玉米平均占61.7%,且其对肥料的依赖性远大于小麦;③氮肥对带田产量特别是玉米产量起着主要作用,产量贡献率达55.2%～80.9%;④小麦对磷肥反应明显,玉米对钾肥反应明显;⑤有机肥料与无机肥料结合,以氮肥为主,氮、磷、钾平衡施肥是带田土壤培肥的基本途径。 |
| 关键词: 带田，土壤肥力，土壤培肥，作物产量 |
| DOI： |
| 分类号:S158.3 |
| 基金项目:甘肃省科委资助项目 |
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| Soil Fertility Change and Fertility Improvement in Wheat/Maize Strip Intercropping I.Effects of Fertility Change and Different Fertilizer on Crop Yields |
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Jin Shaoling 1 Li Long 1 Zhang Lihui 1 Ma Yongtai 2 Suo Dongrang 2 Wu Guoqing 2 Wang Ping 2,Jin Shaoling 1 Li Long 1 Zhang Lihui 1 Ma Yongtai 2 Suo Dongrang 2 Wu Guoqing 2 Wang Ping 2,Jin Shaoling 1 Li Long 1 Zhang Lihui 1 Ma Yongtai 2 Suo Dongrang 2 Wu Guoqing 2 Wang Ping 2
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| Abstract: |
| A fixed-site field experiment was conducted to study the effects of different fertilizers on soil fertility in wheat/maize strip intercropping and soil fertility improvement ways.The results showed that:①when no fertilizer was applied,soil fertility
in strip intercropping decreased rapidly and crop yields decreased greatly;②the maize
yield took 61.7% of strip intercrop yield,on average,with greater dependence on fertilizers comparing with wheat;③N fertilizer plays a decisive role to strip intercrop yields,
especially to maize yields,whose contribution rates reached 55.2%～80.9%;④The response of wheat to P fertilizer is greater that that of maize,but the response of maize to
K fertilizer is greater;⑤Combination of organic with inorganic fertilizers,and equilibrium of N,P,and K fertilization with N as the pricipal are the basic to the soil fertility improvement in strip intercropping. |
| Key words: strip intercropping,soil fertility,soil fertili tyimprovement,yield |
