Abstract:
Objective This study aimed to explore an environmentally friendly and cost-effective strategy for alleviating continuous cropping obstacles in muskmelon cultivation.
Method The chemical fertilizer treatment (NPK), organic fertilizer treatment (OF), bio-organic fertilizer treatment (BIO), bio-organic fertilizer containing biomass ash treatment (BIOS) and combined application of bio-organic fertilizer and biomass ash treatment (BIO + S) were carried out. The pot experiments were conducted to study the effects of different fertilization treatments on the growth of muskmelon, soil physicochemical properties and enzyme activities after two consecutive application.
Result Continuous application of bio-organic fertilizer (BIO) and its combination with ash (BIO + S) significantly increased the plant height, area of the largest leaf, fresh and dry weight of continuous cropping muskmelon compared with NPK and OF treatments. BIO + S treatment not only significantly increased the stem diameter, fresh and dry weight of continuous cropping muskmelon compared with BIO, but also increased soil organic matter, available potassium content, as well as soil enzyme activities of alkaline phosphatase. Correlation analysis and principal component analysis indicated that soil organic matter, available potassium content and alkaline phosphatase activities were significantly positively correlated with growth indicators, such as fresh weight, dry weight, and stem diameter of muskmelon, respectively. BIO + S treatment had better effects on promoting plant growth and improving soil properties than BIO treatment.
Conclusion The combined application of bio-organic fertilizer and ash could effectively promote the growth of continuous cropping muskmelon, improve soil nutrients and enzyme activities, as well as reduce the muskmelon continuous cropping issue.
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