Research On Dry Matter Production And Yield In The High-yield Cultivation Conditions Of Different Ecological Regions In Sichuan

In order to explore the growth characteristics of super-high-yielding rice, taking the high-yielding rice demonstration sites of four ecological regions including Pixian, Hanyuan, Linshui, Shehong in Sichuan province as the research object, the dry matter production, nitrogen accumulation, yield and its components were studied with four ecological regions, transplanting methods, fertilize methods, different yield levels. The results showed as follows:1. At heading the higher dry matter distribution and conversion of stem and sheath, nitrogen distribution and transportation of leaf, dry matter and nitrogen distribution of ear were in favor of the higher dry matter and nitrogen distribution of ear at maturity.The dry matter distribution and conversion of stem and sheath at heading was more conducive to the increase of dry matter and nitrogen distribution of ear at maturity than the dry matter and nitrogen distribution of ear at heading in the different ecological regions, the nitrogen distribution of ear at heading was more conducive to the increase of dry matter and nitrogen distribution of ear at maturity than the nitrogen distribution of leaf. The dry matter and nitrogen distribution of ear had the same trend in heading and maturity between different transplanting methods, the dry matter of stem and sheath and nitrogen distribution of leaf was no significant differences, the dry matter conversion of stem and sheath and nitrogen transportation of leaf were influenced by different varieties, the dry matter and nitrogen distribution of ear with mechanized transplanting were higher than it with optimal cast transplanting and artificial transplanting.The only advantage of polypeptide urea was the dry matter distribution of stem and sheath at heading, the dry matter and nitrogen distribution of ear at maturity of urea with 4 fertilizer was higher, the dry matter distribution and conversion of stem and sheath and nitrogen distribution and transportation of leaf of 2 mixed fertilizer were higher, the dry matter and nitrogen distribution of ear was no significant differences between 2 mixed fertilizer and 4 mixed fertilizer;2. The differences of rice yield were the panicle number and spikelets number per spike in the different locations. The differences of rice yield were the panicle number, spikelets number per spike and setting rate, the spikelets number per spike with mechanized transplanting was higher, the panicle number, spikelets number per spike and setting rate with optimal cast transplanting and artificial transplanting were influenced by different varieties. The yield advantage of urea with 4 fertilizer was the panicle number and spikelets number per spike, the yield advantage of 2 mixed fertilizer was the spikelets number per spike and setting rate, the panicle number and spikelets of 2 mixed fertilize was lower.3. The dry matter and nitrogen distribution of stem and sheath and ear at heading of super rice were higher, the dry matter and nitrogen distribution of leaf was lower, the dry matter conversion of stem and sheath and nitrogen transportation of leaf were higher, the dry matter and nitrogen distribution of ear at maturity were more higher than it at other yield populations, the yield advantage of super rice was the higher spikelets number per spike and setting rate, the panicle number and 1000-grain weight were counter. The research was a theoretical reference about the spread of large area at Super High Yield Cultivate of rice.