论文部分内容阅读
由于北方常干旱少雨,土壤水分难于满足高产小麦对水分的需求。因此,一般高产小麦田都需人工灌溉。据资料介绍,灌溉使小麦的增产幅度可在24～100%。但在什么条件下灌水,灌多少水,指示方法不尽一致。有的仍沿用当土壤水分处在田间持水量70%时灌水;有的是在小麦不同生育阶段灌水;也有的是人为判断麦田是否需灌水。这些方法都有其局限性,况且生产者很难掌握。针对辽宁省近几年小麦迅速发展的趋势以及水资源贫乏的自然条件,我们用负压计(张力计)进行了指示春小麦灌溉的田间试验,以寻求在生产中既可广泛应用,又能使春小麦增产,节水的灌溉方法。
Due to arid and dry conditions in the north, soil moisture is hard to meet the water demand of high-yielding wheat. Therefore, the general high yield wheat fields need artificial irrigation. According to the introduction of data, the yield of wheat can be increased by 24-100% by irrigation. However, under what conditions irrigation, irrigation, how much water, instructions are not consistent. Some are still used when the soil moisture in the field when the water capacity of 70% of irrigation; some at different stages of wheat irrigation; also some people judge whether the wheat field irrigation. These methods have their limitations, and producers are hard to master. In response to the rapid development of wheat in Liaoning in recent years as well as the natural conditions of poor water resources, we conducted a field experiment with spring wheat irrigation with a negative pressure gauge (strain gauge) to seek widespread application in production and enable Spring wheat yield, water-saving irrigation methods.