摘要
以嫁接茄子为试材 ,采用 4 .1、 4 .8、 5 .5万株·hm-2 3种密度和双杆整枝、自然整枝 ,在日光温室吊绳栽培 ,研究不同群体结构对光合特性、干物质分配及产量的影响。结果表明 :双杆整枝的功能叶光合速率高于自然整枝 ,且各层次光合产物分布均匀 ,根系生长较旺盛 ,是增产的主要原因。茄子产量与中下部功能叶片光合速率关系密切 ,在试验范围内密度越小 ,中下部叶片水分利用效率和蒸腾速率越高 ,光合速率越高 ,呼吸消耗小 ,总产量也越高。
The photosynthetic characteristics and dry matter distribution pattern were studied with gafted eggplant in three plant densities (41000 plants · hm -2, 48000 plants · hm -2 and 55000 plants·hm -2) and two training methods (natural training and double-stem training) in greenhouse. The results indicated that photosynthetic rate was higher and dry matter was distributed evenly at different canopy levels with double-stem training. Vigorous root growth was also found in this treatment. All these resulted in higher yield of eggplant. There lied significant positive correlation between eggplant yield and functional leaves at middle and lower canopy levels. The lower plant density, the higher water use efficiency and Transpiration rate. Higher photosynthetic rate together with lower respiration rate contributed to higher yield.
出处
《园艺学报》
CAS
CSCD
北大核心
2004年第5期603-606,共4页
Acta Horticulturae Sinica
基金
国家高技术研究发展计划 (863计划 )项目 (2 0 0 1AA2 470 11)
关键词
茄子
群体结构
光合特性
干物质分配
产量
Eggplant
Graft
Plant density
Training method
Photosynthetic rate
Dry matter distribution
