土壤干旱胁迫对不同品系马尾松水分利用效率的影响

Effect of soil drought stress on water use efficiency of Masson pine of different Speices

以盆栽1年生不同品系马尾松苗木为材料,研究了土壤干旱胁迫对不同品系马尾松苗木水分利用效率的影响.结果表明,受到土壤干旱胁迫时,464、23和75品系苗木的水分利用效率都有不同程度的下降;其余品系苗木的水分利用效率则有不同程度的上升,其中83、127和38品系苗木的水分利用效率上升幅度较大,表明这些品系在减少水分消耗的同时仍能维持较高的光合生产潜力.

The effect of soil drought stress on water use efficiency was investigated by one-year-old Masson pine of different speices. The results showed that the WUE of each speices increased except class 464, 23, 75 during soil drought stress. Some speices increased relatively high such as class 83, 127 and 38 etc. The promotion of WUE demonstrated that these speices of Masson pine could maintain relatively high photosynthesis productivity during the descendant of water.