Arkadolith土壤改良剂对杨柴生长状况及沙土改良效果研究

为探讨Arkadolith土壤改良剂对沙土理化性质以及沙生植物生长状况的改良效果,采用异地温室人工模拟试验的方法研究了改良剂不同施用率处理(CK:0%;A1:4%;A2:8%;A3:12%;A4:16%)对库布齐沙漠沙生植物群落优势种杨柴生长状况以及土壤理化性质的影响。试验结果表明,施用Arkadolith土壤改良剂能显著提高杨柴生长状况,施加改良剂4种处理新梢生长高比对照增加了4.35%~43.5%,植被叶片数呈:A4>A2>A3>A1>CK,杨柴地上生物量比对照增加了36.8%~168.5%,同时减小了植株的根冠比;施用Arkadolith土壤改良剂改善了植物体内的水分状况,增加了植株的吸水量,提高了杨柴在全天各时段的叶水势;施用Arkadolith土壤改良剂能改善土壤物理性状,降低土壤容重、提高土壤孔隙度、降低土壤渗透速度、增加田间持水量;并且能增加土壤养分储备,提高速效养分,缓解养分失衡。

Effects of Arkadolith Soil Modifier on Sand Soil.s Properties and Growth of Astragalus Mongolicum

To find out the amelioration effect of Arkadolith,a new soil modifier on sandy soil physical and chemical properties and the growth of Astragalus mongolicum,a dominant species in sandland community in Kubuqi Desert,effects of different application rate(CK:0%;A1:4%;A2:8%;A3:12%;A4:16%) of Arkadolith were compared by means of simulated experiment in laboratory.The results show that the application of Arkadolith can significantly improve the growth status of Astragalus mongolicum,the growth of new shoots incre...