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2001—2002年,对在中国宾川(亚热带)和韩国水原(温带)两生态区8个籼稻品种的产量潜力进行评价.结果表明,亚热带生态条件下实际产量和产量潜力比温带条件下高1.25和4.43t/hm2,差异极显著.亚热带生态条件下具有较高产量潜力,是因为具有较多的生物产量和颖花量,分别比温带条件下多2万/m2和422.25g/m2.对产量构成因子进行通径分析,结果表明,亚热带生态条件下,对产量的影响大小依次是有效穗、穗粒数、结实率、千粒重;温带生态条件下则是千粒重、穗粒数、有效穗、结实率.在亚热带生态条件下,增产途径应是在保证足够有效穗的基础上,适当降低穗粒数而增加结实率;温带生态条件下应在提高千粒重的基础上,保证适当穗粒数.
The yield potential of 8 indica rice varieties in Binchuan (subtropical China) and South Korea’s Suwon (temperate) ecotopes was evaluated from 2001 to 2002. The results showed that the actual yield and yield potential in the subtropical ecological environment were higher than those in the temperate zone And 4.43t / hm2, respectively, with a significant difference.However, the higher yield potential in the subtropical ecological environment is due to the higher biomass and spikelet yield, which is respectively more than 20000 / m2 and 422.25g / m2 under the temperate conditions. The results showed that under the condition of subtropical ecological environment, the effect on the yield was in the order of effective panicle, grain number per spike, seed setting rate and 1000-grain weight under the subtropical ecological conditions; while the grain weight, grain number per panicle, Seed-setting rate.In the subtropical ecological conditions, the yield-increasing approach should be to reduce the number of grains per spike and increase the seed setting rate on the basis of ensuring adequate effective spike, and to ensure the proper number of grains per spike under the condition of temperate zone ecological conditions.