黄土丘陵沟壑区刺槐造林试验研究

Research on Robinia pseudoacacia Resource Wood Cultivation Test in Hilly-gullied Loess Region

以品种、密度和整地方式为试验因素,采用正交试验设计方法,研究了各因素不同组合对刺槐造林成活率和苗木生长的影响。结果表明,不同品种、不同栽植密度和不同整地方式对刺槐成活率、苗木质量指标影响显著。提高刺槐造林成活率的首选培育方案为普通刺槐,栽植密度1.5 m×1.0 m,全面整地;其次为普通刺槐,栽植密度1.5 m×1.0 m,穴状整地植后扩穴。3种不同整地方式单位面积造林成本差异不大,以机耕整地造林成本最低,穴状整地栽植后扩穴成本最高。

Taking species, density and land preparation methods as its experimental factors, investigate influences on survival rate and seedling growth of Robinia pseudoacacia based on different combinations of various factors by applying to orthogonal experimental designing method. The results showed that different species, planting densities and different land preparation methods make significant effects on seedling quality index and survival rate of Robinia pseudoacacia. To improve the survival rate of Robinia pseudoacacia, the first choice should be common Robinia pseudoacacia whose planting density was 1.5 m × 1.0 m, with an overall land preparation method and the second one was cave - like soil preparation then expanding the cave after cultivation who shares the same density. The paper finds out that the three soil preparation methods have no obvious difference in forestation costs per area, and among them the mechanized farming method cost the least, while the cave -like soil preparation method cost most.