Study On Planting Density Of Rice Direct Seeding Technique

Rice is the main grain crop in our province.I was wet and dry cycle of water resources change,water resources quantity is about 60%of the flood runoff,often form the spring and summer flood,flood and non flood rivers dry,even for the wet year and dry year.The traditional rice cultivation methods rely on water and demand is very large,so that rice production in our province is bound to be limited.Therefore,the development of water-saving agriculture is of great practical significance and long-term significance to solve the problem of water shortage in China,as well as the realization of sustainable development strategy and the protection of food safety in china.The study was supported by the National Natural Science Foundation of China("project law No.51509155)on the influence of degradable mulch on soil water transport.".According to the 2016 plot experiment in rice fields in Haicheng city of Liaoning Province test Wen Xiang Zhen Darien,through orthogonal test to study the way of rice in different plant live Technology(A:14/17/20),(B:20/25/30),and the spacing of each hole number(C:4/6/8),the effect on rice growth,yield,quality and economic index.So as to find out the best planting density of direct seeding rice.The aim of this study was to provide scientific theoretical basis for the planting density of rice direct seeding technique.(1)the relationship between medium growth and density:For the medium-term growth indicators:A factor columns:K1>K3>K2 B factor:K2>K3>K1 C factors:K3>K2>Ki;optimal solution for height is A1B2C3,distance of 14,25 spacing,grain number 8.In the experiment,the optimal scheme is obtained by visual analysis A1B2C3.(2)the relationship between yield components and density:Impact on the effective panicle number of effective panicle rice:affected by plant and row spacing,the spacing influence.The spacing is not better,when the spacing is greater than 25cm,the grain number per spike decreased as the spacing distance increases,but the decreasing effect is not obvious,so that the spacing is conducive to increasing the grain number in 25-30cm.Effect of effective panicles per plant and row spacing:with the increase of Rice Panicles decreased.The results showed that the number of effective panicles per plant was negatively correlated with planting density.With the increase of effective panicle number per hole was first increased and then decreased.Influence on 1000 grain weight:spacing is not better,when the spacing is less than 17cm,with the height of seedlings increased with the spacing decreases,but the increment is not very obvious,but when the plant spacing was 20 cm maximum.Through the analysis of experimental data for the 20cm plant spacing,row spacing of 30 cm per hole,6 grains of rice,new rice yield the highest broadcast film.