The Study On Training And Pruning Of "Xiantao 1" (Lucuma Nervosa)

"Xiantao 1" (Lucuma nervosa) was used as experimental material, the effect of plant growth, yield and quality of Lucuma nervosa "xiantao 1" by different training system, different pruning methods and time was studied. The results show that:1. Light intensity, chlorophyll a content, total chlorophyll content, weight of 100 leaves and thick of 100 leaves of the open-shape were higher than the dome-shape. Compared with the dome-shape, weight of 100 leaves and thick of 100 leaves of the open-shape was respectively increased 11.6g and 3.9mm, it was significant difference. Rate of flower shoot and fruiting in tree body internal and yield per plant of the open-shape were higher than the dome-shape, and stereoscopic fruiting. In general, the open-shape is the better tree shape for Lucuma nervosa "xiantao 1"2. It would be increase the proportion of medium and short flower branch, no matter which ways of pruning, but total number of flowers does not always increase. At the same time, the results show that number of flowers of Lucuma nervosa "xiantao 1" reach to a certain degree, it would have no great influence on number of fruits. Pruning on February 11 has the largest number of flowers and get the heaviest of yield plant, which has the same effect as cutting back leaving 30cm pruning of last year shoots. Overall, methods of spring pruning of Lucuma nervosa "xiantao 1" is suitable to cut short leaving 30cm of last year shoots on February 11.3. The best of summer pruning treatments is topping the summer shoots which 30cm length and thinning. The pruning treatment can reduce fruit dropping rate and improve single fruit weigh, yield per plant and total sugar content. The fruit dropping rate was 67.30%, was the lowest of all treatments, and lower than control 10.60%. Its single fruit weight and yield per plant were respectively 278.1g and 43.38kg, were more than 14.4g and 13.48kg respectively. Its total sugar content was more than 10.43%.In total, summer pruning ways of Lucuma nervosa "xiantao 1" is suitable to top when summer shoots are 30 cm and thin.