摘要
根据长江流域优质、高产水稻新品种气候生态鉴定试验(1985～1986)的穗粒资料和同期气象资料,分别对单位面积上的有效穗数、每穗粒数和结实率的形成建立了相应的数学模型。决定有效穗数的重要气象因子是分蘖期的日照百分率和平均温度。决定每穗粒数的重要因子是出苗一抽穗的生育期长度与有效穗数。决定结实率的重要气象因子则是抽穗前15天至抽穗后25天的日照百分率和平均极端最高和最低温度。在建立“库”产量模型时,假定千粒重是稳定的品种特性,空粒率是限制“库”产量的因子而秕粒率的形成则与“源”产量不足有关。模拟值与试验值之间有较好的一致性。
In this paper, the characteristics of geographical distributions for rice yield components in the Yangtze Valley were described, and also the sinksource relations of different rice varietal types in the concerned region were analysed, based on the following established models or submodels, named, 1) effective panicle number per unit field area, 2) grain number pet' panicle, 3) filled-grain percentage, 4) 'rice clock' model for development, 5) 'source' yield model, 6) 'sink' yield model. The results are of great importance to assessing the climatic suitability of different rice varietal types in the studied region, to finding the climatic constrains on rice yield, to pointing out the way to increase yield and to making decisions in rice managements. The authors finally tested and evaluated the results, using the data taken from the Rice Climatic-Ecological Experiment conducted in the Yangtze Valley between 1985—1986,
出处
《中国农业气象》
CSCD
北大核心
1990年第2期27-34,共8页
Chinese Journal of Agrometeorology
关键词
水稻
计算机模拟
生态
穗粒
气候
Rice Yield
Yield Component
Ratio of Sink Yield to Source Yield
