干旱地带辐射松整地造林研究

Experiments with the Site-preparation Afforestation of Pinus radiata D.Don in Arid areas

经过连续3年采用不同的整地方式对辐射松(Pinus radiataD.Don)造林及幼林生长的试验研究,结果表明:(1)干旱地带采用水平沟、短册状整地比穴状整地造林成活率提高2.4~7.8个百分点,保存率提高1.0~7.6个百分点,高生长量提高7.8 cm^28.4 cm,地径生长量提高0.28 cm^0.84 cm。(2)水平沟整地比短册状、穴状整地0~100 cm土壤含水量全年分别提高1.29个百分点和2.08个百分点,旱季分别提高1.36个百分点和1.37个百分点,雨季分别提高1.16个百分点和2.87个百分点;短册状整地比穴状整地0~100 cm土壤含水量全年提高0.80个百分点,旱季提高0.01个百分点,雨季提高1.72个百分点。

Three years of experiments were conducted with the afforestation of Pinus radiata D. Don and the growth of its young forest through different site-preparation ways. The results are as follows： （1）The survival ratio of the Pinus radiata plantation planted in arid areas was by 2.4%-7,8% higher than the control and its preservation ratio was by 1.0 % -7.6 % higher than that of the latter; The height increment of Pinus radiata tree was by 7.8 cm-28.4 cm higher than that of the control and the ground diameter-increment of the former was by 0.28 cm-0.84 cm more than that of the latter. （2） As compared with the control, the annual moisture content of the plantation in soil of 0-100 cm in depth increased by 1.29 % and 2.87 % all the years, and the moisture content in soil of 0-100 cm in depth increased by 1.36% and 1.37% in the dry season and increased by 1.16% and 2.87% in the rain season,the annual moisture content of the plantation in soil of 0-100 cm in depth increased by 0.80% all the years, and its annual moisture content in soil of 0-100 cm in depth increased by 0.01% in the dry season and increased by 1.72% in the rain season.