GLS油茶无性系幼林产量构成规律的研究

Study on the Yield Composition Law of GLS Clones in Camellia oleifera Young Crop

分析GLS系列油茶无性系幼林的始产期产量构成变化规律,结果表明示范林始产期后产量构成表现为低产株数比例逐年降低,高产株数比例逐年提高;低产株数比例累积逐年减少,高产株数比例累积逐年增加;林分群体逐年由低比例高产植株承担群体低比率的产量向高产植株比例增加,同时承担群体产量也提高的趋势发展;林分群体产量逐年度增加。经营措施对油茶林分群体产量构成产生明显的影响,经营水平高的油茶无性系林分不挂果与低产级别的产量比率较低,高产级别植株级别的产量比率较高,林分整体产量高;经营水平可以决定着低产株积累量向高产株数积累增加的进程,经营水平越高,低产株积累量随年度降幅越大,林分群体产量越高。

This change law of the yield composition on the high oll yield clones in Camellia oleifera young crop of GLS serial at the early yield period was analyzed in this paper, the result indicates that the ratio of the low output level decreases and the high output level increases by years on the yield composition; the cumulation of the ratio of the low output level decreases and the cumulation of the high output level yield cumulation increases by years on the yield composition. The ratio of the high yield plant increases and the high yield ratio increases by years in the tree stand composition. Management measure has great effect on the yield composition of the Camellia olelfera young crop, the higher of the management level the lower of the ratio of the low output tree yield. The course that the cumulation of the ratio of the low output level moving to the cumulation of the high field cumulation were determined by the level of management. The higher of the management level of the young crop, the greater of the cumulation of the low yield plant decrease extent by years, the higher of the yield of the forest stand.