摘要
通过密肥试验，研究水稻生育中期群体叶面积组成与光合生产的关系． 结果表明：高光效群体，高峰苗期的总茎蘖数相当于适宜穗数的１ ．２ ～１ ．３ 倍，拔节期有效分蘖叶面积率为９０ ％ ９３ ％ ，拔节至抽穗期茎蘖下降速率小，抽穗期在适宜叶面积下，有效和高效叶面积率分别为９０ ％ ９５ ％ 和７５％ ８０％ ，叶片的叶绿素含量和含氮率高，叶片的平均净光合大，抽穗后叶面积衰退慢，抽穗至成熟期的光合势和净同化率大，籽粒产量高．
Under condition of different amount of N fertilizer and different planting density. Studied on the relationship between leaf area composition of population and photosynthetic production of rice at middle growth stage. The results showed, high photosynthetic efficiency′s population was the total amount of maximum of tillers and stems conresponds to 1.2～1.3 times of suitable amount of spikes and had 90%~93% of the effective tillers′ leaf area at enlongation stage and the low declining speed of tillers and stems from enlongation stage to heading stage and 90%~95% of the effective leaf area and 75%~78% for high effetive ones at enlongation stage under the condition of suitable leaf area and high nitrongen and chlorophyll content in leaf and high average net photosynthesis. And also the declining speed of leaf area is slow after heading, the photosynthetic potentials and net assimilation rate from heading stage to riping stage is high and yield is high.
出处
《扬州大学学报（自然科学版）》
CAS
CSCD
1999年第4期47-50,共4页
Journal of Yangzhou University：Natural Science Edition
基金
江苏省农业科技基金
关键词
水稻
生育中期
叶面积
光合生产能力
产量
rice
middle growth stage
leaf area
photosynthetic production
