宁夏阴湿易旱区春小麦肥力因子分析

Analysis of Fertility Factors of Spring Wheat in Humid and Dry Area of Ningxia

采用主因子分析对宁南阴湿易旱区影响春小麦产量的养分及土壤水分等１０因子进行分析，结果表明：氮素与小麦分蘖期到灌浆期的土壤含水量呈显著正相关；速效氮及拔节期土壤含水量与产量呈显著正相关。因此，在增产措施中，应采用增施氮肥、有机肥，适量施用磷肥的方法，并结合秋深耕、春免耕等措施。

factors affecting the yield of spring wheat in humid and dry area of southern Ningxia,including nutrient and soil moisture factors,were analysed using key component analysis method. The results show that a significant positive correlation between nitrogen and soil moisture from tillering period to filling period of wheat and a significant positive correlation between the yield and rapidly available nitrogen and soil moisture during shooting period were found.So it is suggested that application of nitrogen and organic manure should be increased and application of phosphoric fertilizer should be moderate combining with autumn deep plowgh and spring zero tillage.