限水灌溉下缩行匀株对冬小麦耗水特征的影响

he Haihe Plain is one of the areas in China with the most scarce water resources. During the winter wheat season, a large amount of groundwater is extracted for irrigation, which brings a heavy burden to the agricultural ecological environment. In order to reduce irrigation, improve water use efficiency, and achieve sustainable development, this experiment adopted a two factor (irrigation, row spacing) randomized block experimental design at Xinji Experimental Station in Hebei Province. The irrigation factors were: one-time irrigation at 3 leaf ages in spring (L3) and one-time irrigation at 4 leaf ages in spring (L4); The row spacing factors are: uniform row spacing (7.5 cm, R) and conventional control row spacing (15 cm, N). Measure the spatiotemporal dynamic changes of wheat moisture, changes in farmland water storage capacity, inter plant evaporation and evapotranspiration, and water consumption at different stages of farmland growth. The main research results are as follows: (1) There is not much difference in soil water storage between L4R treatment and other treatments during the sowing jointing period, and the jointing maturity period has increased by 0.04% -3.52% compared to other treatments. (2) The inter plant evaporation of L4R treatment decreased by 1.17% -14.90% compared to other treatments, and the evaporation decreased by 1.00% -3.97% compared to other treatments. (3) Wheat has the highest soil water consumption during the jointing flowering stage, with L4R treatment reducing water consumption by 1.90% -7.67% compared to other treatments.