| 摘要: |
| 在田间试验条件下,以水肥耦合为中心,马铃薯为供试材料,用5因素5水平二次回归正交旋转组合设计方法,研究了宁南山区供水肥时期、供水量、施氮量、施钾量和种植密度5个因素对产量的综合效应。结果表明:①5因素的作用顺序为:种植密度>施氮量>施钾量>补水量>补水肥时期。②供水量与施氮量的关系中,低水低氮配合,产量很低;高水高氮配合,产量也仅在中产水平徘徊;试验条件下, 600 kg/hm2与50 mm水配合,产量高达19. 051 t/hm2.③在水肥状况得到改善的基础上,加大种植密度是增产的必然途径。 |
| 关键词: 水肥条件,马铃薯,植物营养,施肥供水 |
| DOI： |
| 分类号:S532.062 |
| 基金项目:国家“八五”科技攻关项目(85-08-01-07)，中国科学院水土保持研究所所长基金资助项目 |
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| The effect of different water and fertilizer conditions on potato yield |
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| Abstract: |
| Plot experiment was carried out in southern Ningxia by using the design
of orthogonal regression rotation with periods and amount of applying water and
fertilizer (p), amount of irrigation water (W ),N,K and planting density (D) five factors
and five levels to study the effect of them on potato yield.The results indicated that:①
The yield to the five factors was in order of D>N>K>W>P.②Low water and N
levels produced low yield; and high water and N,moderate yield.Under the experimental
conditions, the yield reached 19. 051 t/hm2 with 600 kg N /hm2 and 50mm water.③To
increase plant density is the inexorable way to raise potato yield when the conditions of
soil moisture and nutrienthave bean improved. |
| Key words: water and fertilizer conditions,potato,plant nutrition,supply of fertilizers and water |
