摘要
伸根空间是植被生态系统植物所需养分的直接提供者。以经植被恢复3年后的坡面等的植物卷材伸根空间基质为对象,分析伸根空间对基质养分含量的影响。结果表明:养分含量均值全氮(N)12.350g·kg^(-1),全磷(P)5.519g·kg^(-1),全钾(K)6.329g·kg^(-1),全钙(Ca)16.195g·kg^(-1),全镁(Mg)7.192g·kg^(-1),全铁(Fe)18.245g·kg^(-1),全锰(Mn)0.250g·kg^(-1),有效铜(Cu)1.927mg·kg^(-1),有效锌(Zn)6.675mg·kg^(-1);显著性分析表明,伸根空间对养分元素含量均具有显著性影响,有正显著影响也有负显著影响;以水泥盒(D)为对照,部分养分元素损耗速率加快,如全N、全Mn、有效Cu等,也能降低部分元素的损失速率,如全K、全Ca、全Mg、全Fe、有效Zn等。此外,对于全P,1∶0.5坡面(P2)、沙场(S)能加速P元素的损失,而其余伸根空间能够降低损失速率。根据全国第2次土壤普查养分分级标准,所有伸根空间基质K元素均表现为缺-极缺,且有效Cu在屋面(W)和渣场(Z)表现为中等,其余测定的养分元素含量均表现为稍丰/丰,证明植物卷材对于伸根空间养分保持具有积极意义。
The roots stretch spaces are the direct provider of nutrients needed for vegetation ecosystem plants. The effects of the root stretch space on the nutrient content of the substrate were analyzed. The results showed that the nutrient elements content was total nitrogen 12. 350 g · kg^-1, total phosphorus 5. 519 g · kg^-1,total potassium 6. 329 g ·kg^-1, total calcium 16. 195 g · kg^-1 ,total magnesium 7. 192 g · kg^-1 ,total iron 18. 245 g · kg^-1,total manganese 0. 250 g · kg^-1 ,available cuprum 1. 927 mg·kg^-1, available zinc 6. 675 mg· kg^-1. The significance analysis showed that there was a significant effect which the root stretch space with the nutrient content. With the cement box （D） as the control, the loss rate of some nutrient elements was accelerated, such as total nitrogen, total manganese,available cuprum,etc. ,could also reduce the loss rate of some elements such as total potassium,total calcium, total magnesium, total iron, available zinc and so on. In addition, for total phosphorus, 1 ~ 0.5 slope （P2）, the sand pile （S） could accelerate the loss,while the rest of the root stretch spaces could reduce the loss rate. According to the 2nd national soil survey and the criteria for grading of soil nutrient status, the potassium elements in all the root stretch spaces were shown to be deficient and extremely deficient, and the available cuprum was medium in the roof （W） and gravel field （Z）,and the remaining nutrient content were shown to be slightly abundant and abundant,which showed that the plant roll had a positive significance for the nutrient retention of the root stretch spaces.
出处
《北方园艺》
CAS
北大核心
2017年第20期115-121,共7页
Northern Horticulture
基金
国家科技支撑计划资助项目(2015BAC05B03)
关键词
伸根空间
养分元素
植物卷材
roots stretch space
nutrient elements
plant roll
