【摘要】 新疆北部阿勒泰草原的农牧业生产主要是在荒漠瘠薄的土地上开发和发展起来的,通过对联合国"2817项目"1990年-1992年春小麦和甜菜灌溉试验数据进行分析比较,初步得到该区域春小麦和甜菜土壤水分与生长发育及产量关系。结果表明:春小麦和甜菜的最优灌溉定额分别为433.7和251.2mm,需水系数为1.7和0.22。最大需水量阶段分别为春小麦的拔节-抽穗期、抽穗-灌浆期和甜菜的中期,占总需水量的34%和50%。春小麦的棵间蒸发和植株蒸腾量约占总需水量的40%和60%,而甜菜的棵间蒸发和叶面蒸腾各占31%和69%。更多还原

【Abstract】 The productivity of Altay grassland was mainly developed on barren desert land.In the article,we analyzed and compared test data based on the irrigation experiment of United Nation’s "2817 Project " between 1990-1994,and got the relationship among the soil moisture,spring wheat and sugar beet growth and yield.The results showed that the optimal irrigation quota for spring wheat and sugar beet were 433.7mm and 251.2mm,and the coefficients of water required were 1.4 and 0.22.The stages of the largest water demand were at jointing-heading and heading-filling of spring wheat,and the medium-term growth of sugar beet.Evaporation and transpiration of spring wheat were about 40% and 60% of the total water demand,while sugar beet leaf evaporation and transpiration were 31% and 69%.更多还原