摘要
对嫩江中下游地区小黑杨片林及林网内农作物的水分生产率进行了研究,结果表明:嫩江流域中下游地区小黑杨林分的水分生产率为1.113,较全国农业平均水分生产率(0.8)相对提高39.13%;500 m×500 m的小黑杨农田防护林网,在树高达到10 m时,可使网内农作物的水分生产率提高12.9个百分点,效益十分显著,说明本地区的产业结构是科学的、合理的。
Stand of Populus simonii × nigra and moisture production rate of crop of shelterbelt on middle and lower reaches of Nenjiang River were studied. The results showed that the stand of Populus simonii × nigra was 1. 113and increased 39.13% than the National agriculture mean moisture production rate （0.8）. In farmland shelterbelt of 500m ×500m Populus simonii × nigra, the moisture production rate could be increased by 12.9 percentages while the tree height reached 10 m. The effect was significant. It indicated that the local industrial structure was scientific and reasonable.
出处
《防护林科技》
2007年第2期12-13,共2页
Protection Forest Science and Technology
关键词
小黑杨
林分
林网
作物
水分生产率
Populus simonii × nigra
stand
forest belt
crop
moisture production rate
