哈尔滨地区降水量对大豆产量影响的研究

Study on effects of rainfall quantity to soybean's yield in Harbin district

大豆是需水量较高的作物 ,大豆生长季降水量的数量及其分布特点会直接影响到大豆的产量和品质 ,为表达大豆生育进程中不同时期降水量的重要程度 ,试用积分回归法加以分析 ,从中得出了降水影响大豆产量的三个关键时期 ,第一是 5月上旬至 6月下旬 ,第二是 7月上旬至 8月中旬 ,第三是 8月下旬至 9月中旬 ,重要性排序为 :第一 >第二 >

Soybean is a kind of crops that needs large quantity of water.Quantity and distribution characteristics of rainfall during soybean's growth season will directly affect its yield and quality.In order to express the importance of rainfall quantity in different periods of soybean's growing process,we try to analyze this question with the method of integral regression.From the analysis,we conclude three key periods during which rainfall affects soybean's yield:the first period is from the first tendays of May to the last tendays of June;the second period is from the first tendays of July to the second tendays of August;the third period is from the last tendays of August to the second tendays of September.The order of their importance is that:the first period>the second period >the third period.$$$$