ass日本风韵熟妇pics男人扒开女人屁屁桶到爽|扒开胸露出奶头亲吻视频|邻居少妇的诱惑|人人妻在线播放|日日摸夜夜摸狠狠摸婷婷|制服 丝袜 人妻|激情熟妇中文字幕|看黄色欧美特一级|日本av人妻系列|高潮对白av,丰满岳妇乱熟妇之荡,日本丰满熟妇乱又伦,日韩欧美一区二区三区在线

In order to understand the effects of water—nitrogen coupling on nitrogen accumulation, transportation and distribution, absorption and utilization, and dynamics of nitrate accumulation in soil of dripirrigation multiple cropping oil sunflower in Shihezi area in the northern Sinkiang, based on field experiment, and combined with laboratory experiment, local early maturing variety “new No.5 hybrid oil sunflower” was taken as test materials, and a threelevel complete treatment plot experiment of two factors of water and nitrogen under drip irrigation was conducted. Results showed that nitrogen accumulations of all organs of dripirrigation multiple cropping oil sunflowers of different water—nitrogen combinations were centered by blades at earlier growth stage and by flower disc at late growth stage. Water—nitrogen combination had prominent (p<0.05) or extremely prominent (p<0.01) interaction effect on accumulation, distribution, transportation, absorption and utilization of nitrogen and production of oil sunflowers of all their organs at each growth stage. Appropriate water and nitrogen augment (pure nitrogen amount no more than 232kg/hm2, irrigation amount no more than 3000m3/hm2) can promote effective nitrogen accumulation of each organ of oil flowers and transportation and utilization of nitrogen of oil sunflowers, thus the goal of high production of oil sunflowers was realized. Water and nitrogen coupling significantly affected the nitrate accumulation in soil. With the increase of nitrogen application, the accumulation amount of nitrate in 0～80cm soil layer was increased; with the increase of irrigation water, the nitrate accumulation of 0～40cm soil layer was decreased, and that of 40～80cm soil layer was increased; after harvest, with the increase of irrigation water and nitrogen application, the relative accumulation of nitrate in 40～80cm soil layer was increased, and that of 0～40cm soil layer was decreased. Combining production of oil sunflowers and performance of plants absorbing and transporting nitrogen, the best nitrogen increase in faceplate was 2.16g/plant and yield was 3597.11kg/hm2，the best water—nitrogen combination of this experiment was irrigated with water of 3000m3/hm2 and irrigation with pure nitrogen of 232kg/hm2. 