The Technique Research Of Modifying Canopies On Litchi And Longan

To study the effect of different prunings on investigated group of litchi, Training investigated groups of litchi through different degrees of short cut after harvest, he results show that:sanyuehong Litchi heavy short section, short cut and long put into an average number of branches were3.76,2.41,1.69a, with heavy short section the maximum number of the branch;With clip extent lighter, and into cuttlefish rate increases accordingly, heavy short section, short cut, long put into cuttlefish rate of41%,55%and63%respectively. Long put to ease tree potential, into the highest rate in the flowers. But in feizixiao Litchi of phenomenon, by contrast, heavy short section, short cut and long put into an average number of branches were1.71,1.89,4.02a, the short cut into heavy cuttlefish has the highest rate in the ear, single fruit Numbers increase.as clip degree of increase in the lixiahong litchi, the numbers into branches reduced, length, thick degree, ternate number increased, into cuttlefish rate and reduce thickness rate with that clip to the red light in flower, comprehensive analysis the lixiahong litchi suitable for short cut clip.By cultivating different tree, and the canopy closure longan orchard which carried out a branch, and the thinning, The result which confirmed the experimental results show that establish a high photosynthetic efficiency tree body structure, reduce the number of orchard canopy closure, can effectively improve the orchard ventilation pervious to light conditions, improving yield and fruit quality:linhua orchard branch after the transformation of tree height is reduced, crown enlargement in output per control increase121kg, fruit quality increased significantly; Lu chuan orchard dredging branch, tree body internal light intensity increased with height present the increasing trend; Close GuoChang dragon ShiYanYuan after thinning,After the different plastic longan photosynthesis is not identical also, open heart and spindle, longan relatively light intensity and photosynthesis are better than the contrast. Two kind of tree are suitable for litchi and longan production cultivation. Thinning inside particular fixed number of year to increase production, but can’t fundamentally solve tree body canopy closure.