Effects of biochar on soil improvement and yield and quality of Chinese cabbage in greenhouses
There are soil problems such as soil acidification and heavy metal accumulation in perennial continuous greenhouses,which seriously restrict the sustainable development of agriculture and the safe production of agricultural products,and it is urgent to treat the greenhouse soil with soil degradation problems.The effects of corn straw biochar application on soil,yield and quality of Chinese cabbage were studied through field experiments.The results showed that compared with the control,the pH value of the soil was increased by 0.47-0.86,the organic matter content was increased by 32.0%-65.6%,the total nitrogen content was increased by 8.4%-19.3%,the available phosphorus content was increased by 38.9%-42.3%,and the available Cd content was reduced by 32.8%-47.7%.When 30 t·hm-2 biochar was applied,the yield and soluble sugar content of Chinese cabbage increased by 18.8%and 27.8%,respectively.When 15 and 30 t·hm-2 biochar were applied,the nitrate content in Chinese cabbage decreased by 37.7%and 44.7%,and the Cd content decreased by 22.8%and 60.5%,respectively.It can be seen that high dosage of biochar can more effectively reduce the content of available Cd in soil and the content of Cd in Chinese cabbage.The application of 30 t·hm-2 biochar could better improve the greenhouse soil and increase the yield and quality of Chinese cabbage.
biocharChinese cabbagesoil improvementheavy metalsyield and quality
NETL
NSTL
万方数据
维普
