1) reserve density
保留密度
1.
Four thinning intensities with the reserved densities of 5 600,4 100,3 700 and 1 830 tree/hm2,and a concontrol,with reserve density of 8 000 tree/hm2 were established in the 9-year-old air-seeded Pinus tabulaeformis stands in of Yanqing Country,Bejing.
5 a后,通过比较林下植被组成、外貌、多样性及生物量的差异,研究不同保留密度对飞播油松林植被恢复的效果。
2.
A reserve density of 1 500 trees/hm~2 was considered to be optimum, giving the maximum annual growth in tree height (0.
通过对秦岭林区中龄次生林抚育间伐保留密度进行了长期定位研究,提出了林分组成为4栎3桦3山杨的混交次生林的抚育合理密度。
3.
The effect of reserve density and exposure on the aerial seeding forests of Pinus tabalaeformis were studied according to the investigating data of standard site of Liuling forestry centre in Danfeng-county.
以丹凤县流岭林场的标准地调查资料为依据,采用测树学方法,研究了不同保留密度和不同坡向对油松飞播林生长的影响。
2) stand reserved density
林分保留密度
3) confidential delivery
留言保密
6) retention temperature
保留温度
补充资料：非密度制约因素(见密度制约因素)
非密度制约因素(见密度制约因素)
l焦非密度制约因素见生态因素、密度制约后
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条