避雨栽培对红阳猕猴桃光合特性、植株生长和果实品质的影响OACSTPCD

To investigate the suitable cultivation mode of kiwifruit in Jiangxi Province,the Hongyang kiwifruit was used as the material to analyze the effect of the rain-shelter and open-field cultivation modes on the phenological period of kiwifruit,the garden microenvironment,photosynthetic capacity of leaves and fruit quality.The results showed that the phenophase of Hongyang kiwifruit under rain-shelter cultivation was earlier than that under open-field cultivation,and the fruit-setting rate was significantly increased.Moreover,the diurnal variation of temperature and humidity in rain-sheltered orchard decreased,the canopy temperature decreased by 4.1℃,and the humidity increased by 9.33 percentage points.The surface soil temperature can be reduced by 5.6℃,and soil moisture content can be increased by 2.09 percentage points.During the fruit ripening period,the leaves maintained a high net photosynthetic rate under rain-shelter cultivation,which effectively alleviated the phenomenon of photosynthetic'midday depression of photosynthesis'and promoted plant growth and fruit quality.Besides,the length,width and weight of functional leaves increased by 14.72%,26.18%and 31.38%,respectively,and the diameter and length of fruiting branches increased by 7.91%and 61.79%,respectively.The contents of dry matter,soluble solids,soluble sugar and titratable acid increased by 1.77,0.87,1.28 and 0.22 percentage points,respectively,and the vitamin C content increased by 31.08%.In summary,rain-shelter cultivation can effectively improve the growth microenvironment of Hongyang kiwifruit,advance the phenological period,optimize plant photosynthesis,and improve fruit quality.