【摘要】 通过对长期水泥硬壳覆盖下枣园的土壤和大气状况的研究发现 ,水泥硬壳覆盖能抑制土壤水分蒸发 ,调节土壤温度和大气温度 ,同时在一定范围内影响大气相对湿度。同时使表层土壤中的速效磷含量有所提高 ,而有机质含量却由于缺乏物质归还而有所降低。其最终结果是影响枣树根的分布。图 6 ,表 1,参 14更多还原

【Abstract】 The studies of soil and atmosphere in jujube garden with concrete mulching for a long time showed that concrete mulching might restrain soil evaporation,modify soil and air temperature as well as affect the ralative air humidity in certain range.And the content of available phosphor of surface soil layer was higher than control while the content of organic matter was lower than control for lack of recycle of matter.The final result was that concrete mulching effected the distribution of roots.更多还原