Effect Of Fertilizer And Density On Yield And Quality Of Kenjing 2 Under Protective Tillage

Under protective and conventional tillage, this experiment was designed by using of equality design. The effects of chemical traits of soil, fertilizer and density on yield and quality of Kenjing 2 were discussed in this experiment. The main results showed as follows:1. Water saving and protective tillage of rice could decrease soil bulk density, improve soil porosity and oxidation-reduction potential. The activity of catalase, acid phosphatase, urease was 5.39%,14.52%,8.33% average higher than conventional tillage, but the activity of sucrase was 32.82% average lower than conventional tillage.2. Yield of protective tillage was 16.9% higher than that of conventional tillage .By using the regress equation, we can forecast the biggest value of yield was 12286.95kg/hm~2,when.each experiment factor was 126.11 kg/hm~2, 81.91 kg/hm~2,38.81 kg/hm~2,108.05 kg/hm~2,96 kg/hm~2,31.0 socket /㎡.3. Radio and degree of chalkness of protective tillage were 3.8% and 1% higher than that of conventional tillage. Milling quality of protective tillage was better than that of conventional tillage. Head rice was 8.9% higher than conventional tillage. We can forecast the best value of the index for milling quality on the basis of regress equation: the brown rice was 82.6%, the milled rice was 75. 4 %and the head rice was 70.8%. Protein content and pasting temperature of protective tillage were 0.5% and 0.8% higher than that of conventional tillage, but amylase content of protective tillage was 0.3% lower than that of conventional tillage. Eating grade and quality index of protective tillage were 2.6 and 4% lower than that of conventional tillage.4. When yield and eating grade are best, experiment factors are 123.9kg/hm~2, 129.3 kg/hm~2, 86.2kg/hm~2, 92.3 kg/hm~2, 96 kg/hm~2 and 34.5 sockets per square meter by using the regress equation. Yield and eating grade were 10072.1 kg/hm~2 and 82.5. When yield and quality are best, experiment factors are 143.6 kg/hm~2, 116.8 kg/hm~2, 42.3 kg/hm~2, 186 kg/hm~2, 96 kg/hm~2 and 32.6 sockets per square meter by using the regress equation. Yield and eating grade were 10147.8 kg/hm~2 and 69.4%.