Effect Of Uniconazole Usage On Growth And Yield Of Mechanical Transplanting Hybrid Rice In Long Seedling Bed Period

Uniconazole is a broad-spectrum efficient plant growth regulator and GA3 synthesis inhibitors, both sterilization and weeding effect. It Has function of the control of vegetative growth, inhibition of cell elongation, shortened internodes, dwarf plant, promote lateral bud growth and flower bud formation and enhance the effect of resistance. It can be used to adjust plant type growth period of machine plant rice seedlings. Effect of Uniconazole Usage on growth and Yield of Mechanical transplanting Hybrid Rice in Long seedling bed period was studied. The main results were as follows:1. Uniconazole soaking seed is best in control two varieties of early rice seedling height and leaf age. the seedlings of stem base width, shirane number, the plant fresh weight and seedling rate were significantly higher than Uniconazole intermix seed and Uniconazolespraying seedings,it can improve the quality of machine planting;2. Uniconazole spraying on seedings is best in control two hybrid late rice varieties of early rice seedling height and leaf age, the height of seedlingsis minimum, width size of Seedling stem base followed:uniconazole spraying on seedings> Uniconazole intermixing seed> Uniconazole soaking seed;3. The early rice varieties field machine quality is best by Uniconazole intermixing seed. hybrid late rice varieties field machine quality is best by Uniconazole soaking seed,it is small in the leakage rate, floating seedling rate hook, overturned rate, seedling rate and seedling rate, and the numberof seedling per hill is bigger, seedling live fast,4. Early rice varietiesfield actual yield is the highest by Uniconazole intermixing seed.results, zhongzhao39 is 531 kg/mu, louliangyou 996 is 559.5 kg/mu. Late hybrid rice varieties actual yield is the highest by Uniconazole soaking seed, Hyou518 is 488.5 kg/mu, yueyou9113 is 470.5 kg/mu.thus it can be seen that early rice and late hybrid rice varieties seedling quality, growth and yield factors exist significant differences by different Uniconazole Usage, the Uniconazole soaking seed is most favorable for hybrid late rice older machine planting seedlings, Uniconazole intermixing seed is most favorable for early rice varieties older machine planting seedlings, it is supportive for high yield of the machine planting rice.