摘要
遮阴是莲雾产期调节的关键技术,但遮阴对莲雾的生长发育和光合特性的影响尚需进行深入研究.以印度红莲雾为试材进行 70%遮阴率处理,定期统计新梢长度和新梢生长率,并测定叶片净光合速率、环境温度、叶片温度、气孔导度、蒸腾速率和胞间CO2 浓度等指标.结果表明:遮阴处理显著减少了莲雾新梢长度和新梢生长率,遮阴对不同末梢状态的莲雾新梢长度和新梢生长率的影响也不相同;遮阴可在一定范围内控制莲雾环境温度和叶片温度;遮阴使莲雾植株的光合有效辐射减少,抑制了叶片蒸腾速率和净光合速率,并且减小了叶片气孔导度,降低了胞间CO2 浓度.综上所述,莲雾的遮阴促花栽培可以抑制莲雾的营养生长,促进营养积累并有效利用光能,是一种可提高经济效益的栽培技术.
Abstract
Shading is a key technique in regulating the production period,but the impact of shading on the growth and photosynthetic characteristics of wax apple needs further research.In this experiment,'Yinduhong'wax apple was used as the experimental material,and 70%shading treatment was conducted to induce flowering.The rate of new shoot emergence and the length of new shoots were regularly recorded.The net photosynthetic rate,environmental temperature,leaf temperature,stomatal conductance,transpiration rate,and intercellular carbon dioxide concentration of the leaves were measured periodically.The results indicated that the 70%shading treatment significantly reduced the length and emergence rate of new shoots.In addition,the effects of shading on the rate and length of new shoots in different terminal states of wax apple were also different.We also found that shading with a shade net can control the environmental temperature and leaf temperature of wax apple plants to some extent.Furthermore,70%shading reduced the photosynthetically active radiation of wax apple plants,inhibited the transpiration rate and net photosynthetic rate of the leaves,reduced stomatal conductance,and decreased intercellular carbon dioxide concentration.In summary,the shade-promoting cultivation technique for wax apple is a cultivation method that can enhance economic benefits.It can suppress the vegetative growth of wax apple,promote nutrient accumulation,and effectively utilize light energy.
维普
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