The Effect Of Different Ratio Of N Fertilizer Applied At Early And Late Growing Stage On Super Hybrid Rice Yield In The Southern Henan

The Super Hybrid Rice Y Liangyou 900, guangliangyou 1128, deep Liangyou 1813, Y Liangyou 1129 for tested materials, 2014 pilot area for super rice in Guangshan County faith was carried out by different nitrogen fertilizer experiment and the ratio of nitrogen in different periods, systematically studied the strategy of grain-filling of nitrogenous fertilizer, plant nitrogen content and the factor influenced on biomass and yield of hybrid rice. The main results were as follows:1. A late before, different N fertilizer has influence to the strong grain-filling grain, which in N fertilizer treatment 5:5, 6:4 best, and weak forces N fertilizer treatment had no influence to in their earlier and later. Comprehensive variety and nitrogen fertilizer treatment, deep Liangyou 1813, Y Liangyou 1129 in 5:5, 6:4 nitrogen fertilizer treatment is best.2. This study also known plant nitrogen content in different periods, agronomic nitrogen use efficiency, the physiological nitrogen use efficiency between different, plant nitrogen content in which only exist in elongation stage and grain nitrogen content significantly, and for agronomy nitrogen utilization point of view, Y Liangyou 1129 in mature period than the other is the varieties, ensure better late grain growth, from the point of view of physiological nitrogen use rate, wide variety of Liangyou 112 advantages and the other three varieties, nitrogen treatment for agronomic, physiological nitrogen use efficiency were affected. The research results need further study to prove.3. This study shows that by the nitrogen fertilizer management, pre fertilization in 7:3 can ensure the formation of effective tiller number of rice, improve the quality of rice population promote early earing,meanwhile can control the early stage of the rice heading dry matter accumulation, increase the late earing and nutrient accumulation of dry matter, thus increasing rice seed setting rate, increase rice grains, the rice nitrogen decreased significantly under the precondition of, increase the yield of rice.4. This experimental study shows that different ways of planting machine, hand planting rice transplanting seedling planting plant height is higher than hand, machine planting lodging index was higher than planting, planting machine to lodging, with wide varieties of two optimal 1128 the highest plant height, deep two optimal plant height, the lowest 1813 Y two optimal 1129 the largest diameter, different nitrogen treatment and lodging index in the highest, the most easy to lodging, 5:5 lodging index, lowest ability to resist to v is strongest, the most difficult to lodging.5. This study shows that the analysis from the planting ways, hand effective ear Numbers below the machine planting, planting acres in seed setting rate, grain, grain number per panicle, the actual production were higher than machine planting; Y two different cultivar 900, grain number per panicle, the actual yield is higher than other three varieties, deep two optimal seed setting rate, 1813 mu of effective panicle number is higher than other three varieties, two optimal 1128 thousand seed weight is higher than other three varieties; Different nitrogen treatment in nitrogen treatment and the highest percentage, mu effective panicles in nitrogen treatment is the highest, lo grain, grain number per panicle, actual output reached the highest nitrogen treatment 5:5 in all.