嫩江中下游小黑杨樟子松林分水分生产率研究

Water Productivity of Populus simonii×nigra and Pinus sylvestris var.mongolica Stand in Middle and Lower Reaches of Nenjiang River

较系统地论述了嫩江流域中下游地区小黑杨、樟子松林分的水分生产率,结果表明: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%;樟子松林分的水分生产率为1.441,比小黑杨林分的水分生产率高29.47%,说明樟子松林分是嫩江中下游地区较好的抗旱节水型林分,应在该地区适当增加樟子松林分的比例。

Water Productivity of Populus simonii × nigra and Pinus sylvestris var. mongolica stand in Middle and Lower Reaches of Nenjiang River was discussed systematically. The results showed that water productivity of Populus simonii × nigra was 1.113 and increased 39. 13% compared with the national mean agricultural water productivity. The water productivity of Pinus sylvestris var. mongolica was 1. 441 and was 29.47% higher than Populus simonii × nigra. It showed that Pinus sylvestris var. mongolica stand was a kind of better drought-resistant and water-saving stand . The ratio of Pinus sylvestris var. mongolica stand should be added properly.