机械插秧与条播对盐粳15号生育性状与品质的影响

对水稻新品种盐粳15号2018、2019年连续2年在江苏盐城地区机插和机条播2种栽培方式的种植表现进行考察,主要测试该品种的生育期安全性、叶龄、分蘖动态、产量和品质性状。结果表明,该品种在盐城地区具有安全稳定的生育期,2年机插条件下全生育期分别为158、155 d,机条播条件下全生育期分别为138、134 d。该品种分蘖能力强,机插条件下2年成穗数分别为25.8万、26.1万个/667 m^2,机条播条件下2年成穗数分别为28.8万、27.9万个/667 m^2。该品种产量潜力高,2年机插和机条播产量均在700 kg/667 m^2以上。该品种机插条件下直链淀粉含量2年分别为15.3%、15.6%,蛋白质含量分别为9.8%、9.7%;机条播条件下直链淀粉含量2年分别为16.2%、16.7%,蛋白质含量分别为9.1%、9.0%。

Effects of Mechanical Transplanting and Drill Sowing on the Growth Characters and Quality of the New Japonica Rice Cultivar Yanjing 15

The planting performance of the new japonica rice cultivar Yanjing15 was investigated in the two consecutive years 2018 and 2019 in Yancheng City,Jiangsu Province.It was mainly assessed for the growth period,the dynamic of leaf age and tillering,and yield and quality characters.According to the test results,the growth period of the cultivar was safe and steady,its whole growth periods with mechanical transplanting in 2018 and 2019 were 158 and 155 days,respectively,while their counterparts with mechanical drilling were 138 and 134 days,respectively.The cultivar had an excellent tillering ability;its panicle number per 667m^2 in 2018 and 2019 were 258,000 and 261,000,respectively,with mechanical transplanting;their counterparts with mechanical drilling stood at 288,000 and 279,000,respectively.Moreover,the yield potential of the cultivar was well above the average;its yields in 2018 and 2019 both exceeded 700 kg/667m^2 under either of the cultivation modes.Under the mode of mechanical transplanting,its grains had the amylose contents of 15.3%and 15.6%in 2018 and 2019,respectively,and the protein contents of 9.8%and 9.7%in 2018 and 2019,respectively.Under the mode of mechanical drilling,the grains had the amylose contents of 16.2%and 16.7%in 2018 and 2019,respectively,and the protein contents of 9.1%and 9.0%in 2018 and 2019,respectively.