膜上不同覆土厚度对岩石生长和产量的影响

Effects of Different Membrane Covering Thickness on Growth and Yield of Rock

采取随机区组排列的方式,设置2个不同覆土厚度处理,对岩石进行生长高度、产草量、茎叶比、粗蛋白含量等指标测定,结果表明:覆土厚度1cm时,生长高度和鲜草产量显著高于覆土0.5cm和覆土0cm时的生长高度和鲜草产量;覆土厚度1cm时,岩石在鲜干比、茎叶比、粗蛋白含量等品质方面也表现较好。综合评价膜上穴播苜蓿最适宜的覆土厚度为1cm。

The method of random group arrangement was adopted to set up two different thickness of soil overburden treat- ment and carry out determination on the growth height, grass yield, stem-leaf ratio and crude protein content. Results demon- strated that growth height and grass yield at 1 cm soil overburden were significantly higher than 0.5 cm and 0 cm soil overburden; Turning the soil overburden thickness to 1 cm, rock achieved good fresh-day ratio, stem-leaf ratio, crude protein content. Therefore, comprehensive evaluation on the membrane dibbling alfalfa recommended that optimum soil overburden thickness was 1 era.