| 摘要: |
| 采用田间正交旋转试验设计，于1999年在延安市燕沟进行了小麦产量与氮肥（N）、磷肥（P2O5）和有机肥（M）3因子5水平的新修梯田地膜小麦试验。通过对试验结果数学建模及模型分析得出，本区影响产量的因子效应为N＞P≈M，N肥产量效应约为磷肥、有机肥的3倍，有机肥增产趋势在低肥力时最低，随着肥力水平提高，其增施肥料的增产能力增加，而氮肥、磷肥肥效均呈递减趋势，即肥效随施肥量增加而减少，还分析了本区小麦单位面积产量≥2500kg/hm2的优化施肥组合，筛选的施肥方案为N 251.8～272.5 kg/hm2，P2O5 108.9～136.5kg/hm2，有机肥12 800～16 400 kg/hm2。均值依次为261.1，125.1和14 600/hm2。 |
| 关键词: 地膜小麦 施肥方案 优化模型 栽培模式 |
| DOI： |
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| 基金项目:国家“九五”科技攻关项目(96-04-05-13);中国科学院创新项目(KZCX1-06) |
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| A study of optimum fertilization model for plastic-mulched wheat on newly built terrane land in North Shaanxi Province |
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| Abstract: |
| Field plastic-mulched wheat trials were conducted by using the regression design of orthogonal rotation in terrane land in Yanan City.By means of establishing mathematical models,this paper analysed inter-reaction between wheat yield and the fertilizer input rate (including:N,P2O5,manure).The analysis shows that N rate is more effective than that of P2O5 and M,that is three times of the latter two factors.In order to guide the plantation of wheat,the paper also recommended the input rate of the three sorts of fertilizers to ensure that unit wheat yield could surpass 2 500 kg/hm2.The recommended rate of fertilizers is that N:261.1 kg/hm2,ranges in 251.8-272.5 kg/hm2,P2O5:125.1 kg/hm2,ranges in 108.9-136.5 kg/hm2 and M:14 600 kg/hm2,12 800-16 400 kg/hm2. |
| Key words: plastic-mulched wheat input rate of fertilizer optimum model cultivation pattern |
