【作者】 彭幼红； 石庆华； 李木英；

【Author】 Peng You-hong Shi Qing-hua Li Mu-ying(Department of Agronomy, Jiangxi Agricultural University, Nangcnang 330045)

【机构】 江西农业大学农学系；

【摘要】 研究了氮肥施用量和栽插密度对赣早籼48号产量和品质形成的影响,旨在探求能服务于生产的合理的栽培技术。结果表明:在本地中等肥力水平下,赣早籼48号产量在6 000 kg hm-2左右,全生育期平均吸氮158.25 kghm-2,最高产量在施氮量150 kg hm-2、行株距20 cm×16.7 cm时获得。施氮量和密度两因素在产量表现上存在极显著的互作效应。由于施氮量和密度的不同,形成了数量和质量性状各异的群体,进而影响产量和品质。本试验表明,孕穗期群体LAI在5.9左右时有利于产量的形成。氮肥和密度对整精米率、蛋白质含量和垩白米率等部分米质指标有一定的影响。更多还原

【Abstract】 Summary Effect of amount of nitrogen fertilizer application and planting density on yield and quality of grain of rice Ganzhaoxian 48 was studied to ascertain the suitable cultural practices adapted to the production of a wide area. Results showed that under the local soil and climate on an average this rice variety absorbed 158.3 kg hm-2 of fertilizer N during its whole growing period. A grain yield of 6 000 kg hm-2 and the highest attainable yield 6 525 kg hm-2 was got with 150 kg hm-2 N fertilizer applied and a planting density of 20 cmx16.7 cm. Nitrogen fertilizer applied and planting density showed a significant interaction on grain yield. Owing to the different amount of N applied and different planting density the different quantitative and qualitative population would form. A population with optimum LAI being 5.9 at booting stage was benefit to the high grain yield and grain quality such as the ratio of head rice, chalky rice percentage and protein content.更多还原