【摘要】 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。更多还原

【Abstract】 The primary objective of this study was to elucidate the plant type characters of double cropping rice suitable for mechanized planting and harvesting.Field experiments were conducted in Jiangxi province in 2011,involving three typical double cropping rice areas and ten rice cultivars.The seedling quality,mechanized planting quality,plant morphology,tiller dynamic,grain yield and plant type compositive characters were comparative analyzed.The results indicated that the plant type of double cropping rice seedling suitable for mechanized planting should have the characters as follows: the plant height was 14.0~16.0 cm,leaf age was 3.5~4.0 leaf,white root was 12~15 roots per plant,basal stem width was 0.24~ 0.26 cm,dry weight of 100—seedling was 15.0~17.0 g,sowing equality degree was above 85% for early rice seedling at 30 days age;the plant height was 18.0~21.0 cm,leaf age was 4.0~4.5 leaf,white root was 19~22 roots per plant,basal stem width was 0.28~0.34 cm,dry weight of 100—seedling was 16.0~20.0 g,sowing equality degree was above 85% for late rice seedling at 25 days age.The cultivar plant type suitable for mechanized harvesting should have the characters of compact,strong tiller ability,the growth uniformity of the heading and maturity stage,lodging resistance,diseases resistance,seed shattering resistance,high yield,the growth stage for early rice and late rice was 105~110 days and 108~115 days,respectively.更多还原