摘要
为了研究不同风速对盆栽甜椒生长和蒸腾的影响。该文通过温室盆栽试验,设置了0(CK)、0.4m/s(T1)、0.8m/s(T2)、1.2m/s(T3)的不同风速研究其对盆栽甜椒生长及蒸腾耗水的影响,通过逐步回归分析,给出不同风速处理下盆栽甜椒的昼夜蒸腾量与气象因子的相关性。结果表明:温室内盆栽甜椒生长的最适宜风速是0.8m/s左右,无风或风速过大都不利于甜椒生长。盆栽昼夜蒸腾量也因风速不同而不同,夜间蒸腾量随着风速增加而增大。在甜椒的不同生长时期,白天蒸腾量受风速影响的表现不同。不同风速对温室盆栽甜椒产量、总蒸腾耗水量以及甜椒水分生产率均有极显著影响,分析得出风速偏高增加了甜椒的"无效"蒸腾,同时也降低了甜椒产量。
In order to study the effects of different wind speeds in greenhouse on growth and transpiration of potted sweet pepper,setting wind speed at 0(CK),0.4 m/s(T1),0.8 m/s(T2)and 1.2 m/s(T3),the effects of wind on transpiration and growth of sweet pepper through pot experiment were discussed.The results show that the best wind speed for sweet pepper growth in greenhouse is 0.8 m/s,and no wind and excessive wind speed are detrimental to sweet pepper growth.During day and night,transpiration is different under different wind speeds,with night transpiration increasing as wind speed increased.At different growth stages,influences of wind speed on daytime transpiration are different.Meanwhile,stepwise regression analyses reveal significant correlation between transpiration of daytime and night and meteorological parameters under different wind speeds.The effects of different wind speeds in greenhouse on yield,water consumption and crop water productivity of potted sweet pepper are extremely significant.It is obvious that excessive wind speed increases'inefficient'transpiration,and reduces crop yield.
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2008年第S2期214-218,共5页
Transactions of the Chinese Society of Agricultural Engineering
基金
国家863项目"主要农作物节水高产农艺补偿技术研究"(2006AA100202-2)
"十一五"国家科技支撑计划项目"西部民族地区电子农务平台关键技术研究及应用"(2007BAD33B01)
关键词
甜椒
风速
蒸腾
根冠比
作物水分生产率
sweet pepper
wind speed
transpiration
root-top ratio
crop water productivity
