| 摘要: |
| 针对旱地保护性耕作中播种与施肥不当导致的烧苗、缺苗问题，以旱地冬小麦为例，对保护性耕作的种肥分施问题进行了试验研究，提出了出苗状况的综合评价指标——苗情指数，并通过回归分析建立了苗情指数与种肥间距和化肥施用量间的数学关系式，得出了旱地冬小麦在一定种肥间距下的化肥施用极限和在一定施肥量下的合理种肥间距，为种肥间距的合理调整及合理施肥量的确定提供了依据。 |
| 关键词: 种肥分施,种肥间距,苗情指数 |
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| Applying Fertilizer and Sowing Seeds Separately for Winter Wheat in Conservation Tillage |
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| Abstract: |
| In order to solve the problem of winter wheat seedling damage and missing in conservation tillage,the experiments on applying fertilizer and sowling seeds seperately is conducted. The compre bensive evaluation index of seedling emergency is raised. The relations among seedling emergency,the distance between seeds and fertilizer,and the amount of fertilizer application are expressed by the regression equations. The limits of the amount of fertilizer application and the seed-fertilizer distance are obtained,which can be used as a basis to adjust the seed-fertilizer distance as well as to determine the rational amount of fertilizer application. |
| Key words: applying fertilizer and sowing seeds separately,distance of seeds to fertilizer,indication value of seedling state, |
