关键词: 析取克里格, 析取克里格, 点云数据, 空间插值, 插值参数

Abstract: Pot experiments were conducted to compare the difference of biomass, activity of antioxidant enzymes, Cd concentration and accumulation of two ryegrass varieties under different Cd levels (0, 75, 150, 300 and 600 mg/kg), to select suitable variety for soil cadmium pollution remediation. The results showed that the dry weight of roots of the two ryegrass varieties, the dry weight of the overground part and total plant dry weight of‘Abode’increased first and then decreased with the increase of Cd level. The dry weight of the overground part and total plant dry weight of‘Abode’reached the maximum value of 10.92 g/pot and 12.03 g/pot under 75 mg/kg Cd, increased by 11.13% and 10.67% respectively compared with those of the control. The activities of SOD and CAT in shoots and roots, and the activities of POD in roots of the two ryegrass varieties increased first and then decreased with the increase of Cd level. The content of MDA in shoots increased with the increase of Cd level. The Cd transport coefficient and Cd enrichment coefficient of the two ryegrass varieties were higher than 1. There were genotypic differences in Cd tolerance, absorption and accumulation of different ryegrass varieties. The dry weight of shoots and plants of‘Abode’were higher than that of‘Bond’, and the content and accumulation of Cd in shoots and roots of‘Abode’were higher than that of‘Bond’under 75-600 mg/kg Cd stress. Therefore,‘Abode’is more suitable as a phytoremediation material for soil cadmium pollution.