Effect On Yield And Quality Produced By High-quality Rice Mixed Cultivation

As the improvement of people’s living standard, the demand of high-quality, safety rice is increasing. Conventional rice’s quality is good, but yield is generally low, about6tons per hectare. How to coordinate the contradictions of conventional high-quality rice’s yield and quality becomes the focus of many rice experts and scholars. Research shows that the mixed seeding, interplanting, mixed transplanting can significantly reduce the disease such as rice blast, improve the production and the quality, but the relevant study on mechanism is few. In this study, we screened five conventional rice varieties with different plant type and complementary resistance, and took the way of mixed transplanting and mixed seeding for planting, all varieties planted alone as a control. We determinate the leaf area index, dry matter accumulation, lodging resistance, and other morphological and physiological indicators of rice in the grow processing. We explored the impact on rice yield and quality for the purpose of providing theoretical support and reference for mixed rice cultivation techniques. The main conclusions are as follows.(1) Consider the comprehensive efficiency of yield and quality, we found the treatment3and4, that is the combination with E-xiang No.1:Jianzhen No.2:E-zhong No.5=1:1:3, and E-xiang No.1:Huanghuazhan:Texianzhan=1:1:1, were the optimal proportion of combinations.(2) Most of the mixed seeding and mixed transplanting treatment significantly increased the rice’s production, and the highest harvested yield was7.82t/hm2,0.86t/hm2higher than the contrast. Mixed cultivation significantly increased the effective panicles of rice in maturity, it also had a certain effect on other yield components factor but the difference is not big.(3) Mixed seeding and mix transplanting were beneficial to the grown process of rice, such as increasing rice leaf area index and the total dry matter accumulation, improving crop growth rate, increasing the biomass distributed to panicle at later growth stage, improving the earbearing tiller percentage. Part of the treatment differenced significantly. (4) The rice processing quality had improved, but no obvious difference. The impact on amylose content and protein content were not big. But both the two ways were significantly reduced the appearance quality of rice, that is chalkiness degree.(5) The two ways improved the ventilation of rice population, reduced its canopy light transmittance reasonably and increased the light intercepted. All these increased the yield of rice harvested.(6) Rice mixed cultivation improved the lodging resistance of the stem. Some treatments significantly reduced the length of the second and third elongation internode, and increased the thickness of stem wall, stem thick degree and dry weight of stem.(7) The way of mixed transplanting was more advantageous to further study of the mechanism of high-quality, but mixed seeding was more advantageous to generalize the way and the application. Reasonable selection of varieties and making them matched were very important to playing the advantage of two ways.