摘要
通过专题试验与示范相结合的方法，研究南粳44超高产形成规律和关键栽培技术，为大面积推广应用提供依据。结果表明：（1）南粳44是一个具有超高产潜力的品种，超高产群体的穗数、每穗粒数发展变化空间较大，每穗粒数对产量构成因素有较大的限制作用，产量构成因素对产量直接贡献大小的顺序依次为穗数〉每穗粒数〉结实率〉千粒重，增穗增产效果最好。在满足适宜穗数的基础上，应着力提高每穗粒数和千粒重。本试验条件下，11 250kg／hm^2以上产量及其构成因素95％的置信区间为：穗数1hm^2 2．675×10^6-2．875×10^6，每穗粒数150．2-166．2粒，结实率89．8％-91．6％，千粒重28．9-29．6g，理论产量为11 425．5-11 728．5kg／hm^2 （2）旱育稀植条件下，南粳44的基本苗控制在1hm^2 7．2×10^5-8．1×10^5，施氮量315kg／hm^2左右时，易获得超高产；全量麦秸机械还田塑盘抛秧条件下，南粳44的施氮量285-315kg／hm^2，基本苗为1hm^29．75×10^5，密度和施氮量较为协调，易获得超高产。
In order to provide reference for the farm production, the formation rule of super-high-yielding and its key cultural techniques of Nanjing 44 were researched through specific experiments and demonstration. The results showed that ： ①Nanjing 44 was a variety with super-high-yielding potential. Effective panicles and grains per panicle of super-high-yield- ing population varied widely and the yield components could be limited by grains per panicle mainly. The sequence of yield components contribute to the yield from big to small was effective panicles, grains per panicle, seed-setting rate and 1000-grain weight. Increasing effective panicles was best for the yield increase. Meanwhile, increasing grains per panicle and 1000-grain weight was also benefit to improve yield on the basis of the stable and suitable panicle number. Under conditions of this experiment,95% ＇s confidence interval （CI） for the growth and development of super-high-yielding rice population above ll 250 kg/hm2 yield：effective panicles 2. 675 ×10^6 -2. 875 ×10^6 in 1 hm^2, grains 150. 2 -166.2 per panicle,seed-setting rate 89.8% -91.6%, 1 000-grain weight 28.9 - 29.6 g, and theoretical yield 11 425.5 - 11 728. 5 kg/hm^2. ②It was easy for Nanjing 44 to obtain superhigh-yielding under the condition of dry-raising seedling and thin-planting when the basic seedlings ranged from 7.2 × 10^5 to 8. 1 × 10^5 in 1 hm^2 and the total nitrogen application was about 315 kg/hm^2. Under the condition of throw-seedling with plastic-plate and wheat straw to soil, it was easy for Nanjing 44 to obtain super-high-yielding when the density and the amount of nitrogen were harmonious with the total nitrogen application ranged from 285 kg/hm^2 to 315 kg in 1 hm^2 and the planting density was 9. 75 × 10^5 in 1 hm^2.
出处
《江苏农业学报》
CSCD
北大核心
2009年第1期13-18,共6页
Jiangsu Journal of Agricultural Sciences
基金
江苏省“333工程”培养对象科研资助项目
农业部跨越计划项目“优质抗条晚粳稻南粳44安全轻简生产技术集成与产业化示范”
关键词
水稻
南粳44
超高产
规律
栽培技术
rice
Nanjing 44
super-high-yielding
rule
cultural technique
