Study On Rice Seedling Transplanting And Dense Fertilizer Management Technology In Mianzhu City

From 2012 to 2013, We had used split plot design experiment in mianzhu city of sichuan province, two factors respectively implemented of seedbed soil moisture management+bed cover thickness, water management+Nitrogen application in seedling stage of seedling bed, the types of boards+varieties, density of machine planting+varieties, fertilizer proportion+varieties in 5 field trials, a survey of different management way seedlings cultivation and planting on seedling growth, yield and yield components. The main results show that:(1) Tillering, seedling quality, machine on quality, yield, tube under dry raising seedlings way were significantly better than water drought way. Under dry raising way, the rice yield performance for the bed soil cover kinds of thickness and the increase of n application in seedling stage to increase after decreases, nurtures the dry tube mode in water, rice yield performance for the cover thickness and seedling bed soil n application rate of increase and decrease. Using dry rice-nursery mode seedlings, bed cover soil depth of 0.9 cm, seedling n application rate of 24 g/m2 advisable; Way tube seedlings under water and in drought, soil bed cover depth of 0.5 cm, seedling n application rate of 12 g/m2 is advisable.(2) Dry raising way tube seedlings treatment than water drought treatment group high starting point, turning-green early, tillering speed, high seedling peak, slow down. Dry raising way seedlings, machine planting seedling leaf age process accelerated, but the strain of salience is reduced, stem base width, rooting ability, root dry weight, root cap rate and unit political weight increased significantly, seedlings showed that Dry raising way improving machine planting seedling quality, favorable to improve for us. A water birth quality dry tube Dry raising way off the plane way improved, show the leakage rate increased significantly.(3) the machine plugged into super rice in hard plastic hole tray seedlings seedlings was significantly higher than the plastic a floppy disk. Plastic floppy seedlings after effective ear has improved, but the grain number per panicle decreased, thus new volume group and the plastic hole tray seedlings, but its low seed setting rate and grain led to the decrease of the capacity of enrichment degree is its yield less than plastic hole tray seedlings of the key reasons.(4) with the improvement of machine thrust density, grain number per panicle showed a trend of decrease, group new quantity because it increases with the increase of effective ear, seed setting rate and grain showed a trend of decrease, "?602" of the most appropriate machine optimal density of 258000 hole/hm2, "Q8" and "Dexiang4103" optimal density for the most appropriate machine in 228000 holes/hm2.(5) ratio and the use of different varieties increase earing fertilizer application number (n (one-way) impact on yield and yield components is different. "F498" nitrogen retrusion group new appropriate quantity increased, yield improved significantly. For even the japonica 7 fertilizer and implements the points after fertilization, the final yield increased significantly. In the mode of nitrogen fertilizer management, from the perspective of practical production indica varieties machine planting in only 3 leaf appropriate increase fattened, and japonica rice varieties need to not only increase fat still need to divide second application.