华北农学报2009，Vol.24Issue(5)：123-129,7.
氮肥水平对不同育种时代粳稻产量、氮素吸收利用差异的影响
Effect of N Fertilizer Levels on the Differences of Yield,N Uptake and Utilization in Japonica Rice with Different Breeding Time
摘要
Abstract
A field experiment with 12 Japonica rices selected of different breeding (two breeding time)time was car-ried out on the farm of Yangzhou University, Jiangsu province, China. The effects of different N levels including 0,225, 300 kg/ha N on rice grain yield, dry matter production, N accumulation and utilization efficiency were analyzed. Results showed that, rice yield increased with the selection time replacement and the performance of yield with two times was dif-ferent with N application rate increasing. Yield of 83.3% varieties selected early increased with N application rate in-creasing , while a half of contemporary varieties having higher yield level at 225 kg/ha N level. It indicated that varieties selected early responded more sensitive to N fertilizer than contemporary varieties. Among agronomic traits, plant height and panicle length decreased, grain setting density increased with selection time replacement. Dry matter accumulation, N uptake and utilization efficiency of contemporary varieties were higher than those of varieties selected early. Correlation analysis showed that the relationship between rice yield and dry matter and N accumulation at heading, maturing but joint-ing stages were significant or highly significant positively. N utilization efficiency was positive significantly correlated with yield,negative with plant height and panicle length, It indicated that rice yield, N uptake and utilization efficiency in-creased , plant height tended to dwarf type and panicle type evolution from sparse dense to type with the selection breeding time changed.关键词
粳稻/氮素吸收/产量/育种时代Key words
Japonica rice /N(nitrogen)uptake/ Yield/Breeding time分类
农业科技引用本文复制引用
殷春渊,张胜飞,张庆,魏海燕,张洪程,戴其根,霍中洋,许轲,马群,杭杰..氮肥水平对不同育种时代粳稻产量、氮素吸收利用差异的影响[J].华北农学报,2009,24(5):123-129,7.基金项目
国家自然科学基金(30370827) （30370827）
国家"十一五"科技支撑计划重大项目(2006BAD02A03) （2006BAD02A03）
