Effect Of Different Quantities Of Drip Irrigation On Growth And Development Of Mid-mature High-yielding Soybean Production

Based on the xin da dou27 cooked soybean varieties as materials, studied the different drops of water(W1:975 m3·hm-2, W2:1575 m3·hm-2, W3:2175 m3·hm-2, W4:2775 m3·hm-2) on medium super-high-yield soybean root growth and development, accumulation of dry matter distribution, photosynthetic physiological characteristics, nutrients(N、P2O5、K2O) absorption and distribution, and the influence of yield and yield components. As to provide theoretical basis for water-saving drip irrigation in xinjiang soybean high-yield cultivation. The main conclusions are as follows:1. With the increase of the amount of water dripping,0-40 cm soil moisture increased,0-20 cm soil root dry weight density and lateral root length density has the biggest increase,Secondly is the 20-40 cm soil layer growth; in the latter growth period,0-80 cm soil total root dry weight and total lateral root length increased significantly, at the beginning of filling period.W2, W3, W4 treatment root dry weight, respectively, representing an increase of 14.2% W1, 30.4%, 41.1%,W1, respectively, compared with an increase of lateral length 17.4%, 25.7%, 40.3%; 0-40 cm soil root activity increased significantly, significantly increased root, significantly improving water use efficiency. Increase the amount of water dripping, and promote the growth and activity of the root system, W3, W4 treatment at the beginning of filling period 0-80 cm soil root dry weight is 88.6 g·m-2, 95.8g·m-2,Lateral length of 432.4-482.9 m·m-2, yields are 6082.6-6404.7 kg·hm-2, water use efficiency is about 1.30.2. With the increase of the dripping amount of water, total dry matter accumulation were significantly increased, The treatment of W4, W3 compared to the W1 of total dry matter accumulation was increased by 44.8 %, 34.7%;the leaf area of the 6-15 nodes on main stem and the leaf area index and leaf area duration of upper groups and were significantly increased. the maximum leaf area index was 5.15-5.46, total dry matter accumulation was 1350.0-1451.4kg ·hm-2; I respectively,ncrease in the number of pods of 6-16 nodes, cavities and grains,thus significantly increased the production.The yields of treatment,W3,W4 were to 6082.6-6404.7kg ·hm-2, respectively, compared with W1 were increased of 21.2%-27.6%, the harvest index was 0.39. the most appropriate total dripping amount of field in the whole growth period was 2175-2775m3 ·hm-2 in Yining.3. Increase significantly increase the drops of water, main stem length between 9 and 16 and petiole length, stem diameter decreased; Significantly increased leaf net photosynthetic rate, transpiration rate, stomatal conductance and chlorophyll content, decrease intercellular CO2 concentration; Significantly reduced leaf soluble sugar content and sucrose content, enhance fertility early leaf starch accumulation and stage, efficient operation.4. Increasing the dripping amount of flowers period can increase the content percentage and accumulation of N, P2O5, K2 O in leaves, stems during flower period significantly, and can improve grain yield greatly; can increase the harvest index of N, P2O5, K2 O significantly, each production of 100 kg of grain proportion of N, P2O5, K2 O and K2 O required amount. Each producing 100 kg of grain requires to accumulate N 6.4-6.6kg, P2O5 1.4kg, K2 O 4.6-5.2kg under the condition that grain yield in 6082.6kg·hm-2-6404.7kg·hm-2.