土壤覆盖措施对北五味子园产量影响的试验

通过对北五味子园采取双层黑地膜、单层白膜、覆盖稻草、覆细沙、单层黑地膜、双层白地膜和对照无覆盖等7个不同土壤覆盖措施试验，研究不同土壤覆盖措施对北五味子产量的影响，结果表明：覆双层黑地膜较其他6个试验处理在产量上差异显著，产量最高，与对照相比，覆双层黑地膜提高单位面积产量28．1％，单层黑膜覆盖提高24．0％，覆单层白膜提高13．6％，覆双层白膜提高12．9％，覆稻草提高2．5％，覆沙提高2％。

Soil Covering Measures on Yield of Schisandra chinensis Orchard

Seven different soil covering measures （double-layer black-film ,single-layer white-film ,straw covering , covered sand ,single-layer black-film ,double-layer white-film and the control which is without coverage ） were con-ducted experiments on Schisandra chinensis orchard .The effects of different soil covering measures on the yield of Schisandra chinensis were studied .Result shows that ：the yield of double-layer black-film which are significant than that of the other six experimental treatments are the highest ;compared with the control ,double-layer black-film ,sin-gle-layer black-film ,single-layer white-film ,double-layer white-film ,straw covering ＆ covered sand increase by 28 . 1% ,24 .0% ,13 .6% ,12 .9% ,2 .5% ＆ 2% ,respectively .