The effect of root barrier on wheat growth and yield was studied in the system of poplar younggrowth intercropping with wheat by means of farm testing.
采用田间试验的方法，研究杨树幼林与小麦间作系统中，设置根障对小麦生长和产量的影响。
2
On the base of assuring survival rate and conserving rate, the less the fee used in soil preparation and younggrowth tending is, the higher the economic benefit is.
在保证造林成活率和保存率的基础上，用于整地和幼林抚育方面的经费越少，经济效益则越高。
3
The dehydrogenase activity from the tissues of the stipe and between the stipe and pileus is higher than the lamella and context tissues during younggrowth of the fructification.