栽植带覆草对五味子叶片光合作用年变化的影响

The Effect of Covering Grass Plantation on the Photosynthesis of Schisandra chinensis Leaf

目的:研究五味子晚霜及药害防控措施,降低晚霜及药害对五味子的危害。方法:利用便携式光合仪(CIRAS-2)和光合作用监测仪(PTM-48M)研究了栽植带覆草对五味子叶片光合特性及径流率的影响。结果:栽植带覆草后,推迟了物候期,有效减轻了霜害及药害的发生。虽然在幼叶期叶片净光合速率和径流率较低,但随着叶片发育为功能叶,其净光合速率和径流率逐渐升高,在后期高于对照。结论:通过栽植带覆草可以有效推迟五味子的萌芽时期,但不影响植株全年的光合积累,同时有利于避开晚霜危害及除草剂漂移危害,可以作为五味子防霜的一项措施。

Objective： Study prevention and control measure of spring frost and phytotoxicity to Schisandra chinensis （Turcz.） Baill. Methods： Using a portable photosynthesis apparatus （CIRAS-2） and photosynthesis monitor （PTM-48M）, the change of photosynthesis and stem flow was detected by application of covering grass plantation in Schisandra chinensis. Results： Covering grass in the planting area Of Schisandra chinensis effectively delayed its phenology, reduced spring frost and phytotoxicity damage. Although a relative lower net photosynthetic rate and stem flow in young leaf by covering grass at leaf development stage was detected, these indexes were ／ increased, even sprouting period, higher than that in control at final. Conclusion： Covering grass plantation could effectively but didn＇ t have effect on plant photosynthesis accumulation in Schisandra chinensis. It beneficial to avoid frost damage and herbicide drift hazards.