The Nitro-saving Solution for High yield of Direct Seeding Rice after Cultivating Wheat

摘要

In order to solve the problem of nitrogen over-use in high yield direct seeding rice after cultivating wheat, the research explored different nitro-saving cultivation method from 2008 to 2009, by increasing the rice planting density to enhance yield on wheat stubble. This study set up a test of different direct seeding density in 2 years continuously with 150 kg nitrogen application dose per hectare (as much as 50%-60% nitrogen application dose in regular high yield cultivation condition). By analyzing the productivity, constituent factors, index of quality, RVA of rice, dynamics of leave and tilling, dry matter accumulation etc, the results showed that in conditions of 300 million basic seedlings per hectare, the yield was similar to the conventional nitro-use cultivation. This solution not only relieved the pressure of fertilize on environmental pollution by saving 100-120kg nitrogen per hectare, but also the improved benefits exceed the prime cost of increased use of seeds. This breakthrough innovation provided an alternative for the research of high quality direct seeding rice.