灌溉土壤水分上限对温室番茄开花坐果期生理指标的影晌

Effects of Different Soil Water Irrigation Maximum on Physiological Indexes of Greenhouse Tomato at Flowering and Fruit Bearing Periods

不同灌溉土壤水分上限对温室番茄开花坐果期处理的结果表明 ,灌溉上限为土壤相对含水量 90 %时 ,叶片细胞汁液浓度、细胞膜相对透性最小 ,自由水 /束缚水值最大 ;灌溉上限为土壤相对含水量的 85%时 ,光合速率最大 ;灌溉上限为 80 %时 ,气孔传导值最大 ,气孔阻力最小。蒸腾速率与灌溉土壤水分上限值呈直线相关关系。细胞膜相对透性。

In this paper, greenhouse tomato was treated with different soilwater irrigation maximums at flowering and fruit bearing periods, the results showed that sap concentration leaf cell of and cell membrane penetration power were the least whereas free bound ratio was the highest when irrigation maximum reached 90 percent of the relative water content of soil. Net photosynthesis rate became the highest when irrigation maximum was 85 percent of the relative water content of soil, and when irrigation maximum dropped to 80 percent,leaf stoma taldiffusion resistance was the smallest while stoma conduction was the largest. The transpiratory rate showed liner correlation with irrigation maximum.Net photosythesis rate and cell membrane penetrative power had correlation of quadratic equation curve with the irrigation maximums.