摘要
滇中小麦生长期间,冬温不低,夏温不高,日照时间长,光照强度大.春性和弱冬性小麦一直以较高达率进行光合作用和干物质的形成,加之昼夜温差大(14℃～15℃),对干物质的积累十分有利.小麦生长季节,日光合时间长达10小时以上,光能利用率达1.7%～2.3%,干物质积累高于内地乃至青藏高原,即使在冬季(12月～2月)干物质日增长量最高也有148.7kg/hm^2(内地最高仅为15～75kg/hm^2),开花一灌浆初期平均可达378.0kg/hm^2.
During the primary growth stage of winter wheat in Middle Yunnan Plateau, atmosphere temperature isusually above 5℃. Wheat could continually grow harmony with higher photosynthesis and dry matter accumulation. LAI continually increased. The wheat community had a high rate of vegetative growth. During the late growth stage of wheat (from April to May), daily maximum temperature was lower than 27'℃ Wheat grain filling stage lengthened as no high temperature harmfully affacted on leaf photosynthetic function. During the whole growth stage the daily average sunshine were 5. 2-8.9 hrs, Leaf photosynthetic duration per day was long. Light intensity was high,the maximum total light intensity reached 1750 μE/m2. s -1or more, it was favorite to photosynthesis of leaf inside the wheat community, and resulted in increase the photosynthetic potentiality of the whole community and the dry matter accumulation. All above physiological factors were responsiable for high yields of wheat on Middle Yunnan Plateau.
出处
《西南农业学报》
CSCD
1995年第1期25-30,共6页
Southwest China Journal of Agricultural Sciences
基金
国家八五攻关项目(85-09-01-10)子专题
关键词
小麦
光合作用
干物质积累
高原
光照
温度
Temperature and radiation Accumulation of dry matter Middle Yunnan Province.
