国光苹果化学疏除六年效应测试

Effcet test on chemical thinning of GUO GUANG apple tree im six years

国光苹果喷施化学疏除剂的单次效果表现为疏除当年座果率下降、单果重提高、株产量(适度)降低和次年花量、株产量的极大提高。在一定范围内,化学疏除的单次效果随疏除强度的增强而提高,当疏除率达到或接近50％～55％时,可平稳该次大小两年产量,实现最佳疏除。连续隔年化学疏除必然出现花量稳定趋势,此时应变隔年疏除为连年疏除,以防止大小年的重现。多次化学疏除可大幅度地提高累计产量,缩小大小年幅度。实行化学疏除的国光苹果每年每亩可增产289公斤以上,达到纯增产值320元以上。

The effect of independently spraying chemical thinning agents is as follows: In the spraying year, a decline in the percentage of fertille fruit,an enhancement in the weight of simple fruit and a reduction in the yield of individual tree. In the next year,agreatly increase in the flower quantity and simple tree yield. Within certain limits, the heavier thinning degree, the more notable the independant thinning effect. When the rate of thinning reach or close to 50％～55％, the yield of on-year and off-year will balance and stabilize. The thinning effect will be the best. Continuously biennial chemical thinning can make the result thatthe flower quantity stabilize in different year. Then we should change biennial thinning to annual thinning to prevent the reapearing of biennial bearing. It will increase the accumulated yield greatly by taking chemical thinning continuously. Also it will lessen the difference between on-yeas and off-year. The treated 'guo guang' apple make more than 289kg inereasing production per year in one mu. The output value will increase 320 yuan.