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以往的试验已经明确,在一定穗数基础上,增加每穗粒数,发挥大穗优势,是增加水稻产量的一条重要途径,并且形成了一系列主攻大穗增产的技术,在生产上大面积应用后,取得了较好的增产效益。但是,许多资料表明,现有品种在群体达到一定水平之后,穗数与每穗粒数常呈负相关,这就给进一步高产带来了困难。我们在最近的许多试验中发现,最高苗数较少的处理,由于成穗率较高,仍然能有较多的穗数,穗形随之增大,从而获得较高产量。这就给我们提出了一个启示:现在比较好的栽培技术,尽管成穗率已从过去的50%左右提高到60～70%,但还有30～40%是无效分蘖,是否可进一步控制后期无效分蘖,通过大幅度提高成穗率来稳定穗数,增大穗形获得更高的产量呢?通过1986～1988年的三年试验,逐步形成了可使水稻获得更高产量的新的配套栽培技术,这就是
Past experiments have been made clear that increasing the number of grains per panicle and giving play to the advantage of large spikes is an important way to increase the yield of rice on the basis of a certain number of spikes and has formed a series of major spike production techniques. After application, has achieved good yield increase. However, many data show that the number of spikes is often negatively correlated with the number of spikelets per panicle after the existing breeds reach a certain level, which brings difficulties to further high yield. We found in many recent experiments that the treatment with the highest seedling number can still have more spikes due to the higher spike rate, and the spike shape then increases, resulting in higher yields. This gives us a revelation: now better cultivation techniques, although the rate of spike from about 50% to 60% to 70%, but there are 30 to 40% is invalid tillering, whether to further control the late Invalid tillers, by increasing the rate of panicle formation to stabilize the panicle number and increase the panicle yield higher yield? Through the 1986 -1988 three-year trial, gradually formed a new package to get higher yields of rice This is the cultivation technique