摘要
采用低、中、高3种施氮水平(公顷施氮量分别为25kg、125kg、225kg),对20个品种(系)的氮素利用效率进行了初步研究,结果表明:参试品种可划分为氮高效、氮低效、低中氮高效、高氮高效4种类型,其中吉03-2355、吉03-2843、吉06-56、吉生286为氮高效品种;吉06-39、吉06-44、吉03-55等为氮低效品种;吉粳66、吉06-55、吉粳81等为低中氮高效品种;吉粳88、吉06-43等为高氮高效品种。氮高效品种不论在低氮区、中氮区还是高氮区,产量和干物质产量均较高,尤其是在高氮区;氮低效品种则与其相反;低中氮高效品种只在低中氮条件下产量和干物质产量较高,而高氮高效品种在高氮条件下产量和干物质产量明显增加。
Nitrogen utilization efficiency of 20 rice varieties was studied under 3 Nitrogen application level (25kg, 125kg, 225kg perha). The results showed Nitrogen utilization of tested varieties was divided into four kinds: efficient, inefficient, efficient at low and medium Nitrogen level, and efficient at high Nitrogen level. Nitrogen utilization of ‘Ji 03-2355',‘Ji 03-2843', ‘Ji 06-56' and ‘Jisheng 286' were efficient, whereas that of ‘Ji 06-39', ‘Ji 06-44'and ‘Ji 03-55' were inefficient. Nitrogen utilization of ‘Jijing 66', ‘Ji 06-55' and ‘Jijing 81' were efficient at low and middle Nitrogen level, while that of ‘Jijing88' and ‘Ji 06-43' were efficient at high Nitrogen level. Rice varieties which Nitrogen utilization was efficient had high yield and high dried bio-mass yield no matter in low, medium and high Nitrogen area. On the contrary, rice varieties which Nitrogen utilization was inefficient had low yield and low dried bio-mass yield in all treatments. Rice varieties which Nitrogen utilization was efficient at low and medium Nitrogen level means they have high yield and high dried bio-mass yield in that condition. Rice varieties which Nitrogen utilization was efficient at high Nitrogen level means they have high yield and high dried bio-mass yield in that condition.
出处
《吉林农业科学》
CSCD
2008年第6期7-10,共4页
Journal of Jilin Agricultural Sciences
基金
吉林省重大科技专项:营养
高效
抗病
耐盐水稻新品种选育(20065008)
关键词
水稻
氮高效
产量
干物质生产
品种
Rice
High nitrogen utilization
Yield
Dried bio-mass production
Variety