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旨在阐明适合机械化栽插和收割的双季稻株型性状。通过比较分析江西省3个典型双季稻区10个机插早稻和晚稻品种的秧苗素质、机插质量、植株形态、茎蘖动态、产量和株型综合性状,结果表明:秧龄30天的早稻秧苗株高14.0~16.0cm、叶龄3.5~4.0叶、白根数12~15条、茎基宽0.24~0.26cm、百苗干重15.0~17.0g、播种均匀度85%以上,秧龄25天的晚稻秧苗株高18.0~21.0cm、叶龄4.0~4.5叶、白根数19~22条、茎基宽0.28~0.34cm、百苗干重16.0~20.0g、播种均匀度85%以上,其机插质量好,适合机械化栽插;株型紧凑、分蘖力强、抽穗整齐、成熟一致、抗倒伏、抗病力强、耐落粒、产量高、早稻和晚稻生育期分别为105~110天和108~115天的株型品种适合机械化收割。
The aim is to elucidate the plant type traits of double cropping rice suitable for mechanized planting and harvesting. By comparing and analyzing the seedling quality, mechanical quality, plant morphology, stem and tiller dynamics, yield and plant type traits of 10 early rice and late rice varieties in three typical double cropping rice areas in Jiangxi Province, the results showed that: Seedling height 14.0 ~ 16.0cm, leaf age 3.5 ~ 4.0 leaves, white root number 12 ~ 15, stem base width 0.24 ~ 0.26cm, dry seedlings 15.0 ~ 17.0g, sowing uniformity of 85% or more, seedling age 25 days The plant height of late rice seedlings was 18.0 ~ 21.0cm, the leaf age was 4.0 ~ 4.5 leaves, the number of white roots was 19 ~ 22, the stem base was 0.28 ~ 0.34cm, the dry weight of seedlings was 16.0 ~ 20.0g, the sowing uniformity was above 85% Good quality, suitable for mechanized planting; compact plant type, strong tillering ability, uniform heading, ripening, lodging resistance, strong resistance to disease, high yield, early rice and late rice growth period of 105 to 110 days and 108 ~ 115 days of plant type suitable for mechanized harvesting.