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施氮量与栽插密度对超级早稻中早22产量的影响
引用本文:林洪鑫,潘晓华,石庆华,彭春瑞,吴建富.施氮量与栽插密度对超级早稻中早22产量的影响[J].植物营养与肥料学报,2011,17(1):22-28.
作者姓名:林洪鑫  潘晓华  石庆华  彭春瑞  吴建富
作者单位:1.江西农业大学作物生理生态与遗传育种教育部重点实验室,农业部双季稻生理生态与栽培重点开放实验室,江西南昌 330045;
基金项目:国家"十一五"科技支撑计划项目,江西省科技厅重点攻关项目
摘    要:以超级早稻中早22为材料,采用裂区设计,研究了不同施氮量与栽插密度组合对其产量的影响.结果表明,施氮量和栽插密度及其互作对产量的影响均达显著水平.在中、低施氮水平下,不同密度间产量差异很小,而在高氮水平下,适当降低密度有利高产.在0~195 kg/hm<'2>施氮范围内,有效穗数、生物产量、产量、氮素积累总量、最高茎蘖...

关 键 词:超级早稻  中早22  施氮量  栽插密度  产量
收稿时间:2009-12-25

Effects of nitrogen fertilization and planting density on yield of super early rice Zhongzao 22
LIN Hong-xin,PAN Xiao-hua,SHI Qing-hua,PENG Chun-rui,WU Jian-fu.Effects of nitrogen fertilization and planting density on yield of super early rice Zhongzao 22[J].Plant Nutrition and Fertilizer Science,2011,17(1):22-28.
Authors:LIN Hong-xin  PAN Xiao-hua  SHI Qing-hua  PENG Chun-rui  WU Jian-fu
Affiliation:1.Jiangxi Agricultural University/Key Laboratory of Crop Physiology,Ecology and Genetic Breeding,Ministry of Education/Key Laboratory of Physiology,Ecology and Cultivation of Double Cropping Rice,Ministry of Agriculture,Nanchang 330045,China;
Abstract:Using the split-plot design, effects of nitrogen application amount, planting density and their interaction on yield of super early rice (Oxyza sativa L. cv. Zhongzao 22) were studied. The results show that the yield is significantly impacted by nitrogen application amount, planting density and their interaction. Under the middle or low nitrogen application amounts, planting density does not have obvious impact on yield, while under the higher nitrogen application amount, appropriate decrease of planting density can improve the yield. For the main effects of nitrogen, effective panicles, biomass, yield, total nitrogen accumulation, maximum number of tiller, tiller panicle rate (rate of tiller productive panicles account to total effective panicles) and nitrogen requirement for 100 kg grain production are increased when nitrogen application amounts are increased, however an opposite trend is discovered for seeding setting rate under N application rates 0~195 kg/ha. Spikelets per panicle of the nitrogen application treatments are significantly higher than that of the non-nitrogen treatment. Effective panicles and biomass are increased, while spikelets per panicle and tiller panicle rate are reduced significantly as planting densities from 24×104 to 30×104 hill/ha. The seeding setting rate, apparent utilization ratio of nitrogen and total nitrogen accumulation are not apparently influenced by planting density. Biomass and total nitrogen accumulation have parabolic relationships with yield. The optimum biomass and total nitrogen accumulation are 14.90 t/ha and 155.4 kg/ha respectively. Under the experimental condition, the combination of N 195 kg/ha and 30×104 hill/ha is favorable for high yield of Zhongzao 22.
Keywords:super early rice(Oxyza sativa L  )  Zhongzao 22  nitrogen application amount  planting density  yield
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