摘要
在大田条件下,研究了不同施氮量和耕作方式对超级杂交稻黔南优2058群体质量及产量的影响。结果表明:无论免耕移栽或翻耕移栽,黔南优2058穗前干物质生产量、穗后干物质生产量、总干物质生产量均随施氮量的增加而增加;在免耕移栽条件下,随着施氮量的增加,产量、孕穗期和抽穗期的叶面积指数均有增加的趋势,而粒叶比均有下降的趋势;在翻耕移栽条件下,随着施氮量的增加,最高分蘖期和孕穗期的叶面积指数均有增加的趋势,而粒叶比呈先降低再升高的变化规律;与翻耕移栽相比,免耕移栽处理的干物质生产量、叶面积指数、有效穗数和千粒重较低;免耕移栽处理的平均产量为9.88 t/hm2,比翻耕移栽处理低4.88%,未达显著水平,但平均净产值达4 792.7元/hm2,比翻耕移栽处理高26.03%。
The effects of different fertilizer-N application rates and tillage patterns on the population quality and yield of Qiannanyou 2058, a super rice hybrid, were studied under the conditions of field experiments. The results showed that under the conditions of whether the pattern of no-tillage and transplanted rice （NTI＇R） or the pattern of conventional tillage and transplanted rice（ CTFR）, the dry matter accumulation before heading, after heading and the total dry matter accumulation of Qiannanyou 2058 increased with the application rates of fertilizer-N increased. On the conditions of NTTR, as the application rates of fertilizer-N were increased, the yield and the leaf area index at booting stage and heading stage increased, while the grain-leaf ratio decreased. On the conditions of CTFR, as the application rates of fertilizer-N were increased, the leaf area index at maximum tillering stage and booting stage increased, while the grain-leaf ratio decreased at first, but after the application rate was over 150 kg/hm2, the grain-leaf ratio would be improved. Compared with CTTR, NTTR had a lower dry matter accumulation before and after heading, a smaller leaf area index at heading stage, fewer productive panicles and lighter grains. The average yield of NTrR was 9 877.9 kg/hm2, 4.88% lower than but not significantly different （ at 5% level） from that of CTTR. However, the average net output value of NTI＇R was 4 792.8 yuan/hm2, 26.03% higher than that of CT- TR.
出处
《杂交水稻》
CSCD
北大核心
2009年第2期57-61,共5页
Hybrid Rice
基金
贵州省“十一五”科技攻关重大专项[黔科合NZ字(2005)3001]
贵州省科学技术基金项目[黔科合J字(2007)2069]
贵州大学人才引进科研基金项目
贵州大学研究生创新基金项目
