【摘要】 1998年早季在广州研究了不同类型高产早籼稻群体动态结构差异,结果认为:两系法杂交稻高产新组合培矮64s/E32、培矮64s/9311、粤杂122,其幼穗第2次枝梗原基分化期以前的植株干物重、叶面积指数（LAI）比常规稻高产品种粤香占和特三矮2号表现出明显的生长优势。培矮64s/E32在5个供试材料中在始穗期的LAI最高,达7.81,干物重日增量最大,达8.76kg/亩·d;粤香占的每亩有效穗数最高,达23.3万穗/亩,收获指数是所有参试材料中唯一达到 0.6以上者。更多还原

【Abstract】 The differences in population dynamic structure among some high-yielding indica rice varieties in the early cropping season at Guangzhou were studied. The results indicated that the two-line rice hybrids Peiai 64s/E32, Peiai 64s/9311 and Yueza 122 showed significant advantage over the inbred varieties Yuexiangzhan and Tesan’ai 2 in plant dry matter and leaf area index before the stage of second panicle branch differentiation. Of the 5 varieties, Peiai 64s/E32 had greatest daily increment of dry matter, up to 8.76 kg mu-1d-1(one Chinese mu=l/15 hm-2)at the heading stage, while Yuexiangzhan had largest number of effective panicles (233 thousand per mu) and was the only one which harvest index exceeded 0.6.更多还原