不同水肥条件对马铃薯产量的影响  

The effect of different water and fertilizer conditions on potato yield

作　　者：何华[1] 赵世伟[1] 陈国良[1] 

机构地区：[1]中国科学院水利部西北水土保持研究所,陕西杨陵712100

出　　处：《西北农业大学学报》1999年第5期22-27,共6页Journal of Northwest Sci-Tech University of Agriculture and Forestry（Natural Science Edition)

基　　金：国家"八五"科技攻关项目;中国科学院水土保持研究所所长基金

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／ｈｍ ２ 与５０ ｍ ｍ 水配合，产量高达１９．０５１ ｔ／ｈｍ ２．③在水肥状况得到改善的基础上。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.② Low water and N levels produced low yield;and high water and N,moderate yield.Under the experimental conditions,the yield reached 19.051 t/hm 2 with 600 kg N/hm 2 and 50 mm water.③ To increase plant density is the inexorable way to raise potato yield when the conditions of soil moisture and nutrient have bean improved.

关 键 词：水肥条件 马铃薯 植物营养 产量 

分 类 号：S532.062[农业科学—作物学]