Abstract:

Based on setting up the model system of growth and yield, management model system of Masson pine plantation was established by studying the effects of site, provenance, site preparation, fertilization, and thinning on stand growth. According to cultivation objectives, cutting age and economic evaluation result of multitudinous silvicuture schem were optimized and compared one by one using the management model, then optimum cultivation patterns for different site indexes were obtained. The results showed that cultivating large timber, middle wood and small logs by the optimum cultivation patterns, their cutting age were respectively shorter 4～6a, 9～12a, 8～12a than those being used at present. IRR was respectively raised 1.6%～2.8%, 1.8%～4.1%, 2.1%～4.0% than those of conventional cultivation patterns. NPV was respectively increased 1300～2790, 2009～3447, 1137～3168 yuan·hm^-2. IRR% of optimum cultivation patterns were more than 12%. To cultivating building timber, high planting density does not make good economic benefit, and rational thinning may raise economic benefit. The main models were significance at levels of 5% and 1%, by using F- test and residual error analysis, so management model system and optimum cultivation patterns may be used in study area.

Key words: Masson pine, Building timber, Optimum cultivation pattern, Management model