摘要
为明确施用生物炭对水稻镉吸收的影响,研究了不同生物炭施用量(1.5%、3.0%、6.0%)对土壤pH、土壤有效态镉含量、水稻产量、水稻籽粒中镉含量的影响。结果表明:施用生物炭能够显著提高土壤pH,比对照组分别增加0.05,0.11,0.16。施用生物炭能够降低土壤中有效态镉的含量,比对照组分别降低2.4%、3.8%、7.1%。施用生物炭能够增加水稻产量,施用生物炭的3个处理水稻产量均高于对照处理,但差异不显著。施用生物炭能够抑制镉向水稻植株中迁移,显著降低水稻籽粒中镉的含量,比对照组分别降低20.2%、21.5%、25.8%。在镉污染土壤中施用生物炭可显著降低镉的有效性,降低了水稻镉污染的风险,对保障粮食安全具有重要意义。
In order to clarify the effects of biochar application on Cd uptake in rice,the effects of different biochar application rates(1.5%,3%,6%) on soil pH,available Cd content in soil,rice yield and Cd content in rice grain were studied.The results showed that the application of biochar could significantly increase soil pH by 0.05 ,0.11 and 0.16 respectively.The application of biochar could reduce the content of available Cd in soil by 2.4%,3.8% and 7.1% respectively.The application of biochar could improve rice yield,the yield of three treatments with biochar was higher than that of the control treatment,but the difference was not significant.The application of biochar could inhibit the migration of cadmium to plants and significantly reduce the content of Cd in rice grains,which was 20.2%,21.5% and 25.8% lower than the control treatment respectively.The application of biochar in Cd contaminated soil can significantly reduce the effectiveness of Cd and the risk of Cd contamination in rice,which is of great significance for ensuring food security.
作者
谷学佳
王玉峰
张磊
GU Xue-jia;WANG Yu-feng;ZHANG Lei(Key Laboratory of Agricultural Environment of Northeast Plain,Ministry of Agriculture and Rural Affairs/Key Lab of Soil Environment and Plant Nutrition of Heilongjiang Province/Institute of Soil Fertilizer and Environment Resources,Heilongjiang Academy of Agricultural Sciences,Harbin 150086,China)
出处
《黑龙江农业科学》
2019年第6期47-49,共3页
Heilongjiang Agricultural Sciences
基金
黑龙江省农业科技创新工程(QN028)
哈尔滨市科技创新人才专项资金(2014RFQYJ029)
