The Research In Mechanization Planting Ways And Seeding Rates At Different Early Direct Seeding Rice

In recently years, the mechanization of direct seeding rice because of the characteristics of saving Labour, times, and simple steps. Planting area increased year by year. For the suitable way of planting, seeding rates, seeding variety is rarely appeared in basic research. This research adopts super early rice field trials,2011tests choosen different mechanization direct seeding ways, including strip-direct seeding in shallow ridges and dot-direct seeding in making ridge; Different seeding rate design hybrid rice seeding rate between30-45kg/hm2, inbred rice seeding rates between45-60kg/hm2;2012tests is the same as the2011cases, adopt different early rice varieties between in Zhongjiazao17, Zhuliangyou819, Zhuliangyou09,ChuanguanNO.1,Xiannong25,03you66; After two years of experiment, the rice population development, population quality formation characteristics,conduct the research to the variety characters, lodging resistance, suitable for mechanization direct seeding high yield rate, selection of varieties, mechanization of direct seeding, provides the theory basis. The results show that:(1) In the condition of this experiment, the mechanization of the rice yield gradually increased by the increase of rise seeding rate, it showed that Zhongjiazaol7seeding rate is60kg/hm2, early hybrid rice by the optimal rate of45kg/hm2Luliangyou996level increaseed in output. Between different species, The biggest production of the early rice is Zhongjiazao17, the lowest is Zhuliangyou09, the size of the different varieties yield related to breed its own characteristics, from the experimental results, main factors decide the size of the production for different cultivaty panicle size, ear type, the greater the yield is higher. The same breed in different seeding rate, the key factors influencing the production is an effective panicle number per unit area. Experimental results show that under the experiment condition, choose Luliangyou996, Zhongjiazao17, Zhuliangyou819can get high yield.(2) The different mechanization direct seeding and seeding rates, Dry matters accumulation increased by the increasing of seeding rate.leaf area index is characterized by the same rule, leaf SPAD value, by contrast, the performance of the basic seedling number between groups, as the seeding rate increases with the increase gradually, canopy light distribution performance, by contrast, net photosynthetic rate and decreased along with the increase of seeding rate. Different varieties, dry matter accumulation are similar to those of different seeding rate law. Sowing rates between different species is similar, the basic seedlings are basically identical. The different mechanization direct seeding in dry matter accumulation pattern is consistent, the difference is in the beginning points live tillering stage to panicle differentiation stage of accumulation than strip-direct seeding, strip-direct seeding, dried substance is beginning in the spike differentiation stage to full panicle stage accumulation point than live.In the different mechanization direct seeding, The strip-direct seeding on dry matter accumulation amount is big, effective spike is more, larger output. (3) In the condition of this experiment, the varieties of mechanization direct seeding in the same machine and the same way, as the rate increases, lodging resistance, in turn, reduced, different varieties of hybrid rice land between two optimal ability to resist down than in Zhongjiazaol7, Luliangyou996. In the different mechanization direct-seeding, The lodging resistance in strip-direct seeding belows to the dot-direct seeding. Under the condition of variety test, lodging resistance from big to small in turns is of Zhuliangyou819, Zhongjiazao17,03you66, ChunguangNO1, Zhuliangyou09, Xiannong25. The results show that the varieties against lodging ability influence is bigger, the main reason lies in the variety of physical and chemical properties such as stem wall thick, plant height, stem dry weight, etc. By controlling the seeding quantity size, which can effectively adjust its physical and chemical properties, adjust ability to resist it.