摘要
利用盆栽试验,在控制水肥的基础上,研究冬小麦群体库源比及其与产量的关系,研究表明:水分适宜时,经济产量随着生物产量的增加而增加,随着氮肥施用的增加,经济系数呈现上升趋势,而在重度缺水情况下,增施氮肥对生物产量几乎没有影响,而经济产量在N1时达到最大。粒叶比是衡量库源协调的重要指标之一,单位叶面积负荷量(粒数cm-2叶)和单位叶面积有效生产量(粒重cm-2叶)之间表现正相关,通过水肥配合,建立适宜的光合叶面积,增加结实数(库容),提高粒重(库的充实度)是获得高产的途径。
Based on the pot experiments, the effect of water and nitrogen coupling on the population sink-source ratio and its relationship with grain yield of winter wheat was studied. Results show that economic yields increase with biological yields and with the nitrogen fertilizer more applied, economic coefficient tend to go up under optimal moisture. There is no evident＂ effect on biological yields with more nitrogen fertilizer applied in arid region, while economic yields come to a head in N1 treatment. Grain-leaf area ratio is one of the indexes to weigh the coordination of the sink and the source. The leaf load per unit area （grain number/leal） was found to have a significant correlation with effective production per unit area （grain weight/leaf）. Adopting the optimum combination of water and nitrogen fertilizer for winter wheat to establish rational population leaf area, to increase the number of filled grains （sink capacity） and to improve grain weight （fill rate of sink） constitutes the effective approaches to gain high yield.
出处
《土壤通报》
CAS
CSCD
北大核心
2009年第1期140-143,共4页
Chinese Journal of Soil Science
基金
国家科技支撑计划项目课题(2006BAD05B04)
中国科学院知识创新工程重大项目(KSCX1-YW-09)
中国科学院知创新工程重要方向性项目(KZCX2-YW-406-3)
国家高技术研究发展计划重点课题(2007AA091702)
国家重点基础研究发展计划项目课题(2005CB121108)资助
关键词
水肥耦合
经济系数
粒叶比
Water and nitrogen coupling
Eonomic coefficient
Grain-leaf area ratio
