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我县种植的大部分是旱地小麦,十年九旱,每年春旱发生的时期正是冬小麦返青、拔节、抽穗或开花之时,也是小麦需水最多的时期。小麦需水量:返青至拔节期约占整个生长期的16—18%,此时缺水,会阻碍穗分化,导致穗小、粒少;拔节至抽穗期约占整个生育期的20—30%,此期缺水,导致不育小穗增多,粒数减少;抽穗至灌浆期约占整个生育期的20%,此期水分不足,小麦种子空秕率增大,品
Most of the county’s planted wheat is dryland. Nine years of drought have occurred in ten years. The period of spring drought is the period when winter wheat regreening, jointing, heading or flowering is also the period where wheat needs the most water. Wheat water demand: turning green to jointing about 16-18% of the entire growth period, water shortages at this time will hinder the spike differentiation, resulting in small spikes, fewer grains; jointing to heading about the entire growing period of 20-30% , This period of water shortage, leading to an increase of sterile spikelets, reducing the number of grains; heading to the filling period of about 20% of the entire growth period, the lack of water during this period, wheat seed empty rate increases,