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每平方米播催芽种 10 0、2 0 0、30 0和 4 0 0g的旱育苗分蘖试验表明 ,旱育苗每平方米增加 10 0g播种量时 ,秧苗在苗田期 ,株高、叶龄和分蘖数都减少 0 4个左右 ,百苗干重减少 1 3g ,出穗期推迟 2d。在本田超稀植条件下减少播种量 ,一方面有利于提高低节位有效穗数和低节位的产量贡献度 ;另一方面则有一穗粒数有所减少和千粒重有所降低的趋势。其主要原因是单位面积穗数和总粒数过多所致。因此在减少秧田播种量、增强秧苗素质的同时 ,也应适当减少本田的前期施氮量 ,以利于稳产高产
The tillering tests of dry nursery seedlings per 100 m 2, 0 0,30 0 m and 400 g per m 2 showed that when seedlings were sown at seedling stage, plant height, leaf age and tillering The numbers were reduced about 0 4, Baimiao dry weight to reduce 1 3g, postponed 2d postponed. Under Honda ultra-thin planting condition, the reduction of seeding rate could help increase the yield contribution of low-heading and low-heading panicles on one hand; on the other hand, there was a decrease of grains per panicle and a decrease of 1000-grain weight. The main reason is the spike per unit area and the total number of particles caused. Therefore, reducing seedling sowing and enhance seedling quality, but also should be appropriate to reduce the amount of Honda nitrogen, in order to facilitate stable and high yield