摘要
通过不同播期、施氮量和密度试验,研究南粳9108产量及其构成因素的表现。结果表明：①随着播期的推迟,南粳9108产量显著降低,适宜播种期为5月下旬至6月初。②施氮量对南粳9108产量及其构成因素有显著影响,随着施氮量的增加,南粳9108产量呈先升后降的趋势,全生育期以每公顷施氮262.5-300 kg为宜,基蘖肥与穗肥的比例以6：4为宜,既保证了一定的穗数又增加了每穗粒数。③随着栽插密度的降低,穗数和总颖花量减少导致产量降低,每穗粒数、结实率和千粒重影响较小。南粳9108高产栽培应当合理密植,插足基本苗,主攻大穗以获得足够的总颖花量,并保持稳定的结实率和千粒重。
The effects of different sowing time, nitrogen fertilizing and planting density on the yield and components of Nanjing 9108 were studied. The results showed that： （i） Its yield was significantly decreased with the delayed sowing dates, and the proper sowing time was from the late May to early June. （ii） The effects of amount of nitrogen fertilizing on the yield and eompenents of Nanjing 9108 were obvious; The yield increased firstly and then decreased with the increasing nitrogen level. The yield reached the highest when the rate of nitrogen fertilization was at 262.5 - 300 kg/hm^2, and the ratio of basal-filleting and panicle nitrogen fertilizer was at 6 ： 4 with ample panicles and splkelets. （iii） As planting density decreased, the yield decreased beeanse of deereasing of Penieles and total spikelets, and the effects of spikelets per panicle, setting rate and 1000 grain weight were little. So, Nanjing 9108 high-yielding cultivation should cultivate strong seedling, maintain the sufifeient seedlings,inerease spikelets per panicle to obtain total enough total splkelets and ensure the stable seed setting rate and 1000-grain weight.
出处
《西南农业学报》
CSCD
北大核心
2016年第3期590-594,共5页
Southwest China Journal of Agricultural Sciences
基金
现代农业产业技术体系建设专项资金(CARS-01-47)
农业部超级晚稻新品种选育与示范项目
关键词
播期
施氮量
栽插密度
南粳9108
产量
产量因素
Sowing time
Nitrogen fertilizing
Planting density
Nanjing 9108
Yield
Yield eompenenta
