施用中瑞保水利对冬小麦生长发育及产量的影响

利用盆栽、筒栽、坑测和大田试验相结合的方法，研究了中瑞保水剂对小麦出苗率、根完冠比及生长发育和产量的影响。结果表明，当土壤含水率介于12．1％－16．8％之间时，用保水剂拌种可使冬小麦提早1－3d出苗，出苗率增加25．0％－31．7％，沟施保水剂可使出苗率增加3．3％－8．3％；施用中瑞保水剂，苗期的主要作用是促进根系发育、增大根冠比，拨节以后则转为促进上部分发育，使产量及其构成要素均有不同程度地增加，水分利用率明显提高。

Effect of ApplyingZHONGRUI Water Retaining Agent on the Growth and Development and Yields of Winter Wheat

Effects of applying ZHONGRUI water retaining agent on theemergence rate, the ratio of root and crown, the growth and development, and the yields of winter wheat were studied under different experimental conditions. The results obtained were as follows: the seed emerging time was earlier for 1～3d and the emergence percentage increased by 25.0%～31.7% and 3.3%～8.3% by dressing the seed with the agent PAMN-JCN and applying the agent PAMN-JCN in the sowing furrow, respectively, when the water content of soil is in the range of 12.1%～16.8%; The main effects of applying the agent PAMN-LC were that it stimulated the growth and development of root and increased the ratio of root and crown in the stage of seeding and that it promoted the development of stem and leave, and made the yield and its constituents increase with different degree after jointing, water use efficiency being advanced; The amount of yield would increase with times of irrigation in the season of winter wheat increasing, but the effect of water retaining agent on yield would be lower than the situation of fewer irrigation; The different applying way of water retaining agent had different influence on winter wheat, comparatively saying, applying the agent in the sowing furrow could produce better effect than seed dressing or mixing the agent into surface soil.