Research On Root And Aerial Parts Growth Of Zhonghuang35under Different Drip Irrigation Treatments

In order to reveal the influence of different drip treatment on soybean root growth and flower and pod formation, this experiment use ultra-high yield soybean Zhonghaung35as materials, using the tube experiment method, Studied9times(W1),11times (W2),13times (W3),15times (W4) a total of four kinds of drip treatments,(trial total amount of water dripping in turn were21.0kg·tube-1,25.5kg-tube-1,3.6kg·tube-1,35.4kg·tube-1) study the impact on0-100cm soil water content of each root, root dry weight distribution and water consumption characteristics, aboveground growth and development. The main conclusions are as follows:(1). Increase the drip numbers and total amount of drip irrigation can directly increase the0-40cm soil water content, dripping before Flowering can significantly inhibited before flowering40-60cm and60-80cm soil root growth, but for flower and pod timing of20-40cm soil which promote root growth is relatively maximum, increased pod to mature period total dry weight of roots can significantly increases the volume of the shallow root, but it reduced root volume of60-100cm soil layer, lower soil water content at seeding stage will help improve the flowering stage of root activity.Higher soil water content at flowering period and podding period can substantial increase0-20cm soil layer root activity at podding period to maturity period.(2). Increase the drip volume and the number of drip can significant increase leaf area, The main increase in soybean middle (Section6-Section10) of the leaf area, delayed reproductive latter part of leaf senescence, which will be conducive to the growth of soybeans in the upper part of the dry matter increase and pod grains; significantly reduce the maturity period of dry matter allocated to leaves, husks, skins, increasing the allocation to the grains. (3). Increase the drip volume and times of drip, mainly through increased the middle section, the upper section of the number of flowers, pods and grains,sequentially increased the number of flowers per plant, number of pods per plant, grains, eventually increased yield; increased the numbers of drips and total drip amount can promote root growth and leaves in the upper and middle sections of growing, and numbers of forming flowers and pods is the main reason is to increase yield.(4). With the number of drips and total drip amount increases, soil water consumption reduced, The total water consumption increased, WUE showed an increasing trend, irrigation water use efficiency showed decreasing trend; before flowering to maintain a low soil water content, flowers, pods maintain high soil water content, which conducive to the formation of soybean root growth and flowers, pods, grains, can improve yield and WUE.