摘要
通过对陕西省关中及延安地区５８个县（区）的１４个降水因子和小麦产量进行相关和多元逐步回归分析，结果表明：就秦岭以北、榆林地区以南的降雨场而言，小麦生育期间的各月降水，除２月份以外，均与小麦产量成显著正相关；而休闲期间的６，７，８三月降水与小麦产量成显著负相关。得到了由１月、４月、８月降水和干燥度４个降水因子与小麦产量构成的最优回归模型。最后揭示了降水并不是在延安北部、关中东部和西部旱塬及秦岭北坡沿线各地小麦增产的限制因子，而在关中中部及延安南部，降水增产作用得到一定程度的发挥。
Through correlation analysis to rainfall and wheat yield in Shaanxi province,an opti-mum regression model of them is established.It is indicated that in the north of Yanan,the westand east of rairifed highland in Guanzhong plain and along the north slop line of the Qinlingmountains,the yield-increasing of rainfall is not normally brought into play,but in the middlepart of Guanzhong plain and the south of Yanan,this effect brings into play to a certain extent.And the corresponding yield-increasing measures for wheat in various areas of this province areput forward.
出处
《水土保持通报》
CSCD
北大核心
1996年第4期31-34,50,共5页
Bulletin of Soil and Water Conservation
基金
国家自然科学基金
