寒冷稻作区水稻高产栽培最适密度研究──Ⅰ．不同密度对水稻产量、产量性状及碾米品质的影响

STUDIES ON THE OPTIMVM SPACING OF RICE HIGH ──YIELDING CULTIVATION IN THE COLD RICE PLANTING REGION Ⅰ. EFFECTS OF DIFFERENT SPACING ON RICE YIELD、YIELD COMPONENTS AND RICE MILLED QUALITY

近年来关于水稻最适密度有过许多研究和报道，但就本地区高产水稻栽培最适密度模式的探讨还研究较少。为了探讨本地区水稻高产栽培的最适密度模式，从而为生产上合理密植提供科学依据，应用近代数理统计学方法，进行了藤系１３８为应试品种的不同密度比较试验，提出适应延边地区气候特点和产量水平的最适密度模式。通过整理分析，得出本地区取得公顷９．４２１吨稻谷的最适密度为：１８．７４×１０４苗／１０ａ，密植形式采用２３．１＋９．９ｃｍ４穴正条式小四角，并分析了产量及其因素间的关系。

In recent years, mang researches and reports on the high──yielding rice cultivation in the region is seldom. Applying modern mathematic statistic methods the trial on the different spacing for compaving with Huki 138 as trial variety was anslysed, and the optimum spacing model that fits for Yanbian climatic characters and yield level was put forward in order to explor of the optimum spacing model the high──yielding rice cultivation for the region and to provide scientific basis for farming. For a yield level of 9.4124 ton per hectare, the optimum spacing is 1874×104 seeldings per mu;planting type is 23.1+9.9cm small four-angle.The relations between yield and its components was anslysed.