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通过超产2号品种不同播种量和不同秧龄期试验,明确了播种量100g/m、秧龄期40～45d能明显提高秧苗素质。不仅秧苗根系发达,带有2个分蘖、百株干重达7.7g和维管束数达14个,而且每m2穗数、每穗颖花数、单株粒重及产量均较高。通过一穴不同苗数插秧对比,明确了单本栽培方法比一穴多本(3苗)栽培大幅度增加了有效分蘖天数,提高分蘖力、分蘖成穗率、穗粒数、结实率和千粒重,同时还提高了粒/叶比、有效叶面积、高效叶面积和后期群体光合生产率能力,从而获得11788.5kg/hm2的产量,比多本植增产24.1%以上。
The results showed that the sowing amount of 100g / m and the seedling age of 40 ~ 45d could obviously improve the quality of seedlings through the different sowing rates and different seedling age tests. Not only the root system of the seedlings developed, with two tillers, one hundred dry weight of 7.7g and vascular bundle number of 14, and the number of spikes per m2, spikelets per panicle, grain weight and yield per plant were higher. Through the comparison of seedlings transplanting with different seedlings in one hole, it is clear that the monoculture cultivation method significantly increased the effective tillering days and the tillering efficiency, tillering rate, spikelet number, seed setting rate and 1000-grain weight At the same time, the grain-leaf ratio, effective leaf area, high-efficiency leaf area and late-stage population photosynthetic productivity were also improved. The yield of 11788.5kg / hm2 was thus increased, which was 24.1% more than that of many plants.