论文部分内容阅读
该研究采用疏伐及其它促进结实的技术措施,探讨母树林合理密度和结构。结果表明,25～30年生兴安落叶松第1次巯伐合理密度为300株/ha;结实量比对照区提高6～14倍;出种率提高2.65％～3.16％;发芽率提高4.40％～9.86％;病虫危害率降低1.77％～5.77％。环状剥皮的结实率为90％;单株结实量提高60％。
The study used thinning and other technical measures to promote strong, to explore the reasonable density and structure of the parent tree. The results showed that the first dextrose cuttings of Larix gmelinii at 25-30 years old had a reasonable density of 300 plants per ha and a 6-14 folds increase of the solid density compared with that of the control area. The rate of emergence increased 2.65% -3.16% and the germination rate increased 4.40% 9.86%; pests and diseases reduce the risk of 1.77% ~ 5.77%. Ring stripping seed setting rate of 90%; single plant yield increased by 60%.