毛白杨用材林造林技术措施的研究

Silvicultural Management Techniques for Timber Production of Populus tomentosa

毛白杨（Populus tomentosa）是优良的用材树种，适于建筑材、家具材等多种用途。针对以往生产中栽培技术不尽合理，用材林的产量和效益偏低问题，笔者对毛白杨的几项主要造林技术措施进行了试验，以期为营造毛白杨用材林提供先进合理、经济适用的配套栽培技术。

Study on the silvicultural management techniques for timber production of Populus tomentosa was carried out at the plains in west Shandong Province and the results showed that： 1） with a rapid growth rate, round stem form, high wood intensity and high wood quality, varieties of Populus hopeiensis var. yixian, Populus tomentosa var. lumao50, Populus tomentosa var. 38, and Populus tomentosa var.39 were ideal for the establishment of plantations for the production of furniture and construction timber.2） main afforestation techniques for Populus tomentosa were：60 - 80 cm holes in the overall deep ploughing soil,Ⅰ,Ⅱ grade seedlings of 2 years old or Ⅰ grade seedlings of 1 year old, 1/3 cut of the newly grown stem and total cut of the branches, 20 - 40 cm planting depth,600 m^3· hm^-2 irrigation once at the first ten days of May to the first ten days of June in the normal precipitation year, better effect with yearly 450 g nitrogen fertilizer and best effect with the mixture of nitrogen and phosphorus fertilizer.3）intercropping was an effective way to improve the soil conditions and enhance the productivity of the forestland. The effect in order was consistent with the input of the intercropped crops, ie watermelon or vegetables 〉 peanut or winter wheat 〉 soybean.