【摘要】 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。更多还原

【Abstract】 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 less 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.更多还原