纳米沸石对大白菜镉吸收及土壤有效镉含量的影响

发布时间：2019-06-17 13:38

【摘要】：通过大田试验研究了纳米沸石和普通沸石施用量(11 250、22 500、45 000 kg·hm~(-2))对大白菜产量、品质及镉吸收和土壤全镉及有效镉含量的影响。结果表明,施用纳米沸石和普通沸石显著提高了大白菜产量(鲜重),分别比对照增加了21.3%~35.2%和16.1%~31.8%。普通沸石以45 000 kg·hm~(-2)施用量处理产量最高,纳米沸石以22 500 kg·hm~(-2)施用量处理产量最高。纳米沸石和普通沸石中低施用量(≤22 500 kg·hm~(-2))提高了大白菜氨基酸、还原糖和Vc含量。纳米沸石和普通沸石分别使大白菜地上部镉含量降低了19.3%~37.4%和9.9%~16.2%,使根部镉含量分别降低了8.1%~27.9%和17.3%~25.4%。施用纳米沸石和普通沸石显著降低了土壤有效镉含量,且降低效果随沸石施用量的增加而增加。纳米沸石和普通沸石施用量与土壤有效镉含量存在极显著负相关关系(r=-0.591,P0.01),与大白菜地上部和根部镉含量也存在极显著的负相关关系(r=-0.697,-0.766;P0.01)。与普通沸石相比较,纳米沸石增加大白菜产量、降低大白菜镉含量及土壤有效镉含量的效果更好。
[Abstract]:The effects of the application amount of nano-zeolite and common zeolite (11 250,22 500,45 000 kg 路 hm ~ (-2)) on the yield, quality and total absorption of Chinese cabbage and the total content of soil and soil were studied by field experiment. The results showed that the application of nano-zeolite and common zeolite significantly improved the yield of Chinese cabbage (fresh weight), which increased by 21.3% ~ 35.2% and 16.1% ~ 31.8%, respectively. The highest yield was treated with the rate of 45000 kg 路 hm ~ (-2), and the highest yield of the nano-zeolite was treated with the application rate of 22,500 kg 路 hm ~ (-2). The content of amino acid, reducing sugar and Vc of Chinese cabbage was increased by the medium and low application rate of the nano-zeolite and the common zeolite (拢22,500 kg 路 hm ~ (-2)). The content of the ground part of the Chinese cabbage is reduced by 19.3%-37.4% and 9.9%-16.2% respectively by the nano-zeolite and the common zeolite, and the content of the root of the Chinese cabbage is reduced by 8.1%-27.9% and 17.3%-25.4%, respectively. The application of the nano-zeolite and the common zeolite significantly reduces the effective soil content of the soil, and the effect of the reduction is increased with the increase of the amount of zeolite application. There was a significant negative correlation between the application rate of the nano-zeolite and the common zeolite and the effective content of the soil (r =-0.591, P0.01). There was a significant negative correlation between the content of the ground and the root of the Chinese cabbage (r =-0.697,-0.766, P0.01). Compared with the common zeolite, the nano-zeolite has the advantages of increasing the yield of the Chinese cabbage, reducing the content of the Chinese cabbage and the effect of the active carbon content of the soil.
【作者单位】：西南大学资源环境学院;
【基金】：现代农业产业技术体系建设专项(Nycytx-25) 国家自然科学基金项目(20477032) 国家科技支撑计划项目(2007BAD87B10)
【分类号】：S634.1;X53

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