油茶成龄低产林种群的产量结构与改造对策研究

Studies on Yield Structure,Distribution and Transformation Countermeasures of Low-yield Mature Forest of Camellia oleifera

对50年生的油茶成龄低产林的研究表明,油茶成龄林群体鲜果产量的差异较大,这种产量差异与林分密度几乎无关（r=0.4971）,但与单株平均产量有一定的关系（r=0.765 1）,种群的鲜果产量结构总体表现为：单株在2 kg以下的低产植株占80%左右、在2~5 kg的中产植株占10%~15%、在5 kg以上的高产植株占6%左右,呈现明显的负指数分布（Y=23.49X-1.587 8）,并且构成产量的植株基本上是受品种的影响,因此导致油茶成龄林低产的主要原因是由于低产品种多、中高产品种少,由此提出除劣补优的良种定位置换改造对策。

Studies on 50-year-old low-yield forest of Camellia oleifera showed, fresh fruit yield had great difference among the mature forests of C. oleifera. It was not correlated significantly with stand density （r = 0.4971）, but it was correlated significantly with average yield per individual （r = 0.7651）. The individual whose yield was tess than 2 kg accounts for about 80%. The middle-yield individual whose yield was from 2 kg to 5 kg, accounts for 10% - 15%, and high--yield individual whose yield was more than 5 kg, accounts for about 6%. Individual yield displayed Negative exponential distribution （ Y= 23.49X- 1.587 8 ） .This paper proposed transformation countermeasure of low-yield mature forest of C. oleifera.