【摘要】 1998年早季在广州研究了不同类型高产水稻秧苗生长特性,调查了株高、叶片数、叶片长宽度、叶绿素含量和干物重等项指标,以及地下部分的发根力和根系活力情况。结果显示:在华南地区冷害发生较轻、秧苗生长基本正常的生态条件下,两系法杂交水稻新组合中粤杂122和培矮64s/E32、常规水稻品种特三矮2号表现出强和较强的生长发育优势。此外,两系法杂交水稻的发根数量和最长根长度比常规稻品种要多要长,但根系活力则较低。更多还原

【Abstract】 The growth traits in seedlings of different types of high-yielding rices were studied in early cropping season of 1998 in Guangzhou. Plant height, leaf number, blade length and width, chlorophyll content, above-ground dry weight, rooting ability and root activity were investigated. Under the normal ecological conditions with less chilling injury, two-line hybrid combinations Yucza 122 and Peiai 64s/E32, and conventional variety Tesan’ai 2 excelled in growth. The quantity of emerging roots and maxium root length of two-line hybrid rices were greater than those of conventional varieties, but the former were lower in root activity.更多还原