Study On Characteristics Of Nutritional And Control Technology Of Nitrogen Nutrition For Super-high-yield Rape

In order to explore the impacts of branches and production under the conditions of nitrogen and density for the high-yield rape,and this study was about to a test of nitrogen fertilizer and density;on the other hand,in order to solve the nutrition barriers problems in the every period during current high-yield rapeseed production,so conducted some related field experiment of seedling growth characteristics of rape,nutrient control in medium-term,to strengthen the nutrient latter part.At the same time, the study was also studied the growth characteristics of super-high-yield rape and the nutritional characteristics of nitrogen,phosphorus and potassium.The major results showed that:The growth characteristics and nutritional characteristics of nitrogen,phosphorus and potassium for super-high-yield rape:with the advance of reproductive age,the content of dry matter and the nutrient content of nitrogen,phosphorus and potassium of every part all were a trend of increased first and after reduces in every period,the plants total dry matter content and the total content of nitrogen,phosphorus and potassium were respectively:291.82g;12.97;5.20g;12.85g in mature;Its accumulation rate were both performance f the accumulation trends of first fast and after slow;the distribution of dry matter content and nutrient content of nitrogen,phosphorus and potassium showed:leaves was the main distribution center during the early period;sticks stem was the main distribution centers in flowering period;seeds was the main distribution centers in mature period.The test of different nitrogen and different densities:the study of branches characteristics and output under the different levels of nitrogen and density showed,the effective,ineffective branches were performance the trend of reduced first and after increase with the increasing level of purity nitrogen amount;But the effective were declining and the ineffective branches were in a trend of reduce first and after increase with the increasing density level;The production was increased with the amount of purity nitrogen increased,and the production was in a trend of reduction first and after increasing with the increase of density.The highest yield was under the purity nitrogen in the amount of 26 kg / acre and 9,000 / acre density conditions;it's as high as 287.5 kg / acre.The studies were about a nutrition regulation control mode of before promoting, medium-term control and add to the late:through the study about the characteristics of rape seedling growth and development showed:there was a significant promoting role for growth rate and growth uniformity of rape by a way of forward nitrogen and it was that put the nitrogen into soil one-time by pot experiment,to laid a good material foundation for achieving the super-high-yield.And through the comparison to different leaf growth indicators showed:the 5 leaf stage was the most appropriate period of transplanting.Combined the impact of nutrient control of plants for the rape branch quality in medium-term and the impact of moderate increase nutrient for the rape yield quality in the latter part,Its showed that various measures of the control mode of before promoting,control in mid-time,after the re-nutrition was a useful integrated nutrition-control mode in super-high-yield production,it overcame the barriers question of super-high-yield in the every period,and helped to achieve super-high-yield.