Study On Species Adaptability And Cultivation Techniques For Water-saving And Drought-resistance Rice

Rice is the major grain crops of china, which ensuring the food security in our country. With global warming, droughts become a major factor affecting food production, the rice irrigation water becomes increasingly difficult to guarantee. Today in our country, population arable reverse development, making the current carrying capacity of China’s cultivated land in a more serious crisis. to improve the yield per unit area of land revenue maybe an effective way to solve the dilemma. How to solve the contradiction between water supply and demand, the arable production crisis has become a research hotspot to many scholars.Increasing the Development of water conservation, drought rice production, to saving the limited water resources.Increasing the utilization of most potential rice production resources such as Low-lying waterlogged ground improving the resource utilization, is the rational choice for current rice productionThis study compared the production adaptability and yield formation of several Upland rice varieties in the north region of Hubei. Anglicizing the yield differences under different water management, and different planting methods Aims to get a high quality, high-yielding upland rice varieties, which adapted to the local geographic and climatic conditions to find contradictions and problems in actual production, and explore the solutions. The main conclusions are as follows:1. Eight upland rice varieties could rely on natural rainfall completed fertility process, and have a better yield formation in Xiangyang. Growth period can be no irrigation or irrigation critical growth period1or2times. Four Japonica varieties’growing period is over160days; the other four indica varieties are in110-130days. The yield of Hanyou113was significantly higher than other varieties, up to714.6kilograms per mu. Huhan3Yield stability, maintained at more than500kilograms per mu. WDR37’s production is relatively low, but the quality of rice relative optimum.2. Six varieties, such as Hanyou113, have a mutative yield under the different water management model, the main influencing factors are:valid panicle, grain per panicle and seed setting. The yield of Huhan3and Huhan15has no significant diversification. Compare to the conventional flooded irrigation water consumption, Four Japonica varieties water saving38.8%, the other four indica varieties water saving39.8%. In arid processing mode, all varieties were improved water use efficiency.3.Under Different Cultivation Modes, the yield,BRR,MRR of Huhan3have no significant diversification, but the HMR was significantly reduced Under the direct seeding mode. Overall efficiency of Huhan3under Different Cultivation Modes depends on the level of artificial inputs. The production demonstration of Huhan3at Xiangyang and other places have a higher yield performance, and three of the region’s production was not significant, with better adaptability and yield stability.4.In Xiangyang area, Huhan3’s growing period was slightly longer, Crops for the production of wheat stubble after seemed a bit nervous. In Jingmen area, as traditional manual transplanting mode, the planting density maybe relatively small.In Gong an area, as artificial direct seeding, ensure that all emergence and chemical weed control as the key technology.