Effects of Different Soil Amendments on Growth of Scutellaria baicalensis and Soil Enzyme Activities in Continuous Cropping
In order to investigate the impact of various soil amendment materials on soil enzyme activity and Scutellaria baicalensis growth in continuously cropped soil,an indoor pot experiment was conducted.The experiment set 6 treatments including a control without any amendments(CK),and with biochar application(T1),humic acid(T2),humic acid and biochar(T3),vermicompost(T4),vermicompost and biochar(T5).The agronomic indexes and soil enzyme activities of Scutellaria baicalensis were compared between soil of non-cultivated(Y0)and continuous cropping Scutellaria baicalensis for 3 years(Y3).The results showed that at Y0 condition,the shoot biomass of Scutellaria baicalensis was significantly higher than CK,and the root biomass of Scutellaria baicalensis in 5 treatments had no significant difference compared with CK.At Y3 condition,except T2 treatment,the shoot and root biomass of Scutellaria baicalensis were significantly increased compared with CK.Under 2 soil treatments,T5 treatment had the best effect on total nitrogen content and T4 treatment on phosphorus content and potassium content;T3 treatment to soil sucrase activity and T1 treatment to alkaline phosphatase activity increased the most.At Y0 condition,urease activity of T4 treatment was significantly increased compared with CK,catalase activity of all treatments decreased significantly;at Y3 condition,only urease activity of T2 treatment was significantly increased and catalase activity of T1 treatment was significantly decreased.The nitrogen,phosphorus,potassium content of Y0 was significantly correlated with activities of sucrase and urease,while the nitrogen,phosphorus,potassium content of Y3 was significantly correlated with the activities of urease and catalase.At the same time,at Y3 condition,T5 treatment was more closely related to nitrogen,phosphorus,potassium content in Scutellaria baicalensis and sucrase activity.In summary,T1 and T5 treatments could both increase Scutellaria baicalensis biomass and nitrogen,phosphorus,potassium content at Y3,and the addition of biochar had significant effects on the enzyme activity of continuous cropping soil.T5 treatment had a significant effect on alleviating the barrier of continuous croppping of Scutellaria baicalensis.Above results provided a theoretical basis for alleviating the barrier of continuous cultivation and improving the quality of Scutellaria scutellaria.
国家科技期刊平台
NSTL
万方数据
