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| Effect of nano zeolite application amount on Cd up take by Chinese cabbage and soil available Cd content |
| Received:May 25, 2016 |
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| KeyWord:soil cadmium contamination;nanozeolite;available cadmium content in soil;cadmium uptake;Chinese cabbage |
| Author Name | Affiliation | E-mail | | ZHENG Ying-hui | College of Resources and Environmental Sciences, Southwest University, Chongqing 400715, China | | | XIONG Shi-juan | College of Resources and Environmental Sciences, Southwest University, Chongqing 400715, China | | | XU Wei-hong | College of Resources and Environmental Sciences, Southwest University, Chongqing 400715, China | xuwei_hong@163.com | | LI Xin-chen | College of Resources and Environmental Sciences, Southwest University, Chongqing 400715, China | | | LUO Yu | College of Resources and Environmental Sciences, Southwest University, Chongqing 400715, China | | | QIN Yu-li | College of Resources and Environmental Sciences, Southwest University, Chongqing 400715, China | | | ZHAO Wan-yi | College of Resources and Environmental Sciences, Southwest University, Chongqing 400715, China | |
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| Abstract: |
| Field experiments were carried out to investigate the effect of nanozeolite and ordinary zeolite at the amounts of 11 250, 22 500 and 45 000 kg·hm-2 on the yield and cadmium uptake by Chinese cabbage, and available cadmium contents in soil. The results showed that nanozeolite and ordinary zeolite could increase the yield of Chinese cabbage by 21.3%~35.2% and 16.1%~31.8%, respectively. The highest yield of Chinese cabbage was found at nanozeolite application amount of 22 500 kg·hm-2 and ordinary zeolite application amount of 45 000 kg·hm-2, respectively. Nanozeolite and ordinary zeolite(≤ 22 500 kg·hm-2) increased the contents of amino acids, reducing sugar and Vc in Chinese cabbage. The contents of cadmium in shoots and roots revealed the reduction by 19.3%~37.4% and 9.9%~16.2% after nanozeolite and ordinary zeolite treatments, respectively. The application of nanozeolite and ordinary zeolite significantly reduced available cadmium content in soil in a dose-dependent manner. The application amount of zeolite showed significantly negative relationships with available cadmium content in soil (r=-0.591, P<0.01), and were extremely negatively correlated with cadmium content in shoots and roots of Chinese cabbage(r=-0.697,-0.766; P<0.01). More obvious effects on increasing the yield of Chinese cabbage, and reducing cadmium content in Chinese cabbage and available cadmium content in soil were observed during nanozeolite treatments than those during ordinary zeolite treatments. |
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