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(一)“lR_(50)”参试产量名列前茅广东省农科院水稻所1981年早造承担第二届国际水稻产量鉴定圃-极早熟品比试验.参试品种共25个,计有国际水稻研究所14个,印度4个,斯里兰卡3个,泰国2个,南朝鲜1个,我国广东省1个.其中以国际水稻研究所的“IR_(50)”作为国际统一对照种.广东省的“青二矮l号”为本地对照种.试验设计采用随机区组排列法,3次重复.本田属砂质粘壤土,酸碱度6.72,肥力中等.每亩共施纯氮17.5斤,五氧化二磷13.04斤,氧化钾12.37斤.试验结果是“IR_(50)”名列第一,亩产829.6斤,比对照种“青二矮1号”亩产621.9斤(1981年早造该品种感染穗颈瘟严重)增产207.7斤,增长率
(A) “lR_ (50) ” top of the test yield Guangdong Provincial Academy of Agricultural Sciences Institute of rice as early as 1981 to assume the second session of the International Rice Yield - nursery early test ratio of a total of 25 tested varieties, total There are 14 International Rice Research Institutes, 4 in India, 3 in Sri Lanka, 2 in Thailand, 1 in South Korea and 1 in Guangdong Province of China. The International Rice Research Institute’s “IR_ (50)” is used as the international unified control Guangdong Province “Qing Erjiao No. 1” for the local control species. The experimental design using random block arrangement, repeated 3. Honda is a sandy clay loam, pH 6.72, moderate fertility. Nitrogen 17.5 kg, phosphorus pentoxide 13.04 kg, potassium oxide 12.37 kg. The test result is “IR_ (50) ” ranked first, 829.6 kg per mu, than the control Producing 621.9 kg (early 1981, the breed infected with severe panicle neck blast) an increase of 207.7 kg, the growth rate