| 摘要: |
| 1992～1996年在陕西渭北旱塬合阳县甘井乡进行了冬小麦产量的土壤养分限制因子与高产高效施肥指标试验。结果表明,在渭北旱塬,氮、磷是冬小麦产量的限制因子,钾、铁、锰、镁、硼为非限制因子。限制因子对冬小麦产量的效应P2O5>N,效益最佳平台区施肥量歉水年N 90. 03～104. 17 kg /hm2,P2O583. 74～91. 29 kg /hm2;平水年N 97. 30～132. 31kg /hm2,P2O589. 65～106. 88 kg /hm2。 |
| 关键词: 冬小麦，土壤养分，施肥指标，渭北旱塬 |
| DOI： |
| 分类号:S512.11 |
| 基金项目:陕西省自然科学基金和国家“八五”旱地攻关项目 |
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| Soil Nutrient as Yield Limitation Factors and Fertilizer Supply Index of Winter Wheat |
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| Abstract: |
| From 1992 to 1996, the experiment of soil nutrient as yield limitation
factors and the fertilizer supply index of high yield and great profit in winter wheat had
been carried out in weibei dryland, Heyang, Shaanxi. The result showed that N and P
were the yield limitation factors of winter wheat,K,Fe,Zn,Mn,Mg and B were not the
limitation factors in Weibei dryland.The yield responses of winter wheat to the limitation factors were in the order of P2O5>N.The fertilizer supply ranges of optimum enconomic benefit were N 90. 03～104. 17 kg /hm2,P2O583. 74～91. 29 kg /hm2 in deficit water
year and N 97. 30～132. 31 kg /hm2,P2O589. 65～106. 88 kg /hm2 in common water year. |
| Key words: winter wheat,soil nutrient,fertilizer supply index,Weibei dryland |
