论文部分内容阅读
以松嫩平原为研究区域,自然条件下固定13个农业气象站,以16年平均土壤水分及对应年平均玉米产量为研究对象,分析玉米生长季内0～50 cm土层土壤平均重量含水率及各层平均重量含水率在其主要生育期的分布状况,采用积分回归法分析土壤水分与玉米单产之间的效应。结果表明,在玉米主要生育期间,0～50 cm土层平均土壤重量含水率在抽雄期为最小,播种期及出苗期较大;各层土壤在玉米各生育期重量含水率大小分布基本与0～50 cm土层平均值一致,31～50 cm各层土壤重量含水率明显高于0～10、11～20 cm土层值。松嫩平原玉米在整个生长季土壤重量含水率与其产量在出苗期、乳熟期及成熟期为负效应,而在播种期、三叶期、七叶期、拔节期及抽雄期为正效应。
Taking Songnen Plain as the research area and 13 agricultural weather stations fixed under natural conditions, taking 16-year average soil moisture and corresponding annual average corn yield as the research object, the average soil moisture content in 0 ~ 50 cm soil layer during the growing season was analyzed. And the average moisture content of each layer in the distribution of its main growth period, using integral regression analysis of soil moisture and corn yield between the effect. The results showed that during the main growth period of maize, the average soil water content in 0 ~ 50 cm soil layer was the lowest at the tasseling stage, and the sowing date and seedling stage were larger. The distribution of the weight water content in each layer of maize was basically the same as 0 The average values of ~ 50 cm soil layer were the same, and the soil moisture content of 31 ~ 50 cm soil layer was significantly higher than that of 0 ~ 10,11 ~ 20 cm soil layer. The soil moisture content and its yield in the Songnen Plain during the whole growing season were negative in the emergence, milking and maturing stages, but positive in the sowing, three-leaf stage, seven-leaf stage, jointing stage and tasselling stage.