摘要
以超级杂交稻金优527和黔南优2058为材料,在不同施氮量条件下研究干物质生产的特性。结果表明:在同一生育期,随着施氮量的增加,叶面积指数逐渐增加,不同施氮处理对叶面积指数的影响在生育前期较大,而在生育后期较小;同一生育期的干物质积累量也随施氮量的增加而逐渐增加,且不同施氮量处理对移栽至最高分蘖期和齐穗期至成熟期积累的干物质影响较大,而对最高分蘖期至齐穗期积累的干物质影响较小;随着施氮量的增加,齐穗期和成熟期茎叶鞘、穗部积累的干物质及穗所占的比例均有增加的趋势,而茎叶物质输出率和茎叶物质转化率均有下降的趋势。有效穗数、每穗总粒数随施氮量的增加均有增加的趋势,而结实率和千粒重则相反,且施氮量对有效穗数和每穗总粒数的影响较大,而对结实率和千粒重的影响较小。在0~300kg/hm。的施氮范围内,随着施氮量增加,产量逐渐提高,在本试验条件下,水稻最佳施氮量和最高产量分别为333.22kg/hm^2和12231.40kg/hm^2。
With super hybrid rice Jinyou527 and Qiannanyou2058 as materials,the dry matter production characteristics were studied under different fertilizer-N application rates. Leaf area index increased with the increase of fertilizer-N application at the same growth stage, and the leaf area index at early growth stage were affected more than that at later growth stage. As the application of fertilizer-N increased, dry matter accumulation increased, and dry matter accumulations at transplanting stage to maximum tillering stage and full heading stage to mature stage were affected more than that at maximum tillering stage to full heading stage. The dry matter accumulation in the stem,leaf, sheath and pancile, and the ratio of dry matter accumulation in the panicle increased with the increase of fertilizer-N application at full heading stage and mature stage, while dry matter exportation rate and transloeation percentage of stem and leaf exhibited a reverse trend. As the application of fertilizer-N improved, effective panicles and grains per pancile increased. Seed setting rate and 1 000-grain weight decreased, and also effective panicles and grains per pancile were affected more than seed setting rate and 1 000-grain weight. The rice yield were raised with the increase of N application in the range of 0 - 300 kg/hm^2. Under the condition of this experiment, the best fertilizer- N application and the highest yield were 333.22 kg/hm^2 and 12 231.40 kg/hm^2, respectively.
出处
《江苏农业学报》
CSCD
北大核心
2009年第4期726-730,共5页
Jiangsu Journal of Agricultural Sciences
基金
贵州粮食(水稻
玉米)高产科技示范工程项目
贵州省科学技术基金基目[黔科合J字(2007)2069]
贵州大学人才引进科研基金项目
关键词
施氮量
超级杂交稻
叶面积指数
干物质生产
fertilizer-N application rate
super hybrid rice
leaf area index
dry matter production