Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2021, Vol. 37 ›› Issue (1): 84-89.doi: 10.11924/j.issn.1000-6850.casb20200200110

Special Issue: 园艺

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Effects of Chinese Medicine Residue Compost on Tomato Greenhouse Soils with High Nutrient Concentrations

Wang Guangfei1,2(), Guo Dejie1,2, Ma Yan1,2(), Luo Jia1,2   

  1. 1Institute of Agricultural Sciences and Environments, Jiangsu Academy of Agricultural Sciences, Nanjing 210014
    2Key Laboratory of Agro-Environment in Downstream of Yangtze Plain, Ministry of Agriculture and Rural Affairs, Nanjing 210014
  • Received:2020-02-14 Revised:2020-03-23 Online:2021-01-05 Published:2020-12-25
  • Contact: Ma Yan E-mail:wy_wgf@163.com;myjaas@sina.com

Abstract:

The paper aims to explore the suitable organic fertilizer for eutrophic greenhouse soils. A field experiment was carried out in a solar greenhouse with high nutrient concentrations to study the effects of different dosages of Chinese medicine residue compost (CMR) instead of farm manure on soil properties and tomato yield. CMR application increased soil pH and significantly decreased electrical conductivity by 168.3-268.7 μS/cm, nitrate N content by 116.6-184.9 mg/kg and available K content by 87.0-128.3 mg/kg. CMR applied at dosages of 30 and 45 t/hm2 was more effective than that of 60 t/hm2. With increasing CMR dosage, the decreasing effect on fungal abundance gradually strengthened but the increasing effect on bacterial abundance weakened gradually. CMR applied at a dosage of 30 t/hm2 significantly increased the bacterial abundance and applied at a dosage of 60 t/hm2 significantly decreased the fungal abundance. In addition, CMR application had inhibitory effect on urease, invertase and phosphatase activities. Substrate utilization profiles of soil microbial community showed that CMR application could increase soil microbial activity and diversity. CMR applied at a dosage of 45 t/hm2 significantly increased microbial activity and applied at dosages of 45 and 60 t/hm2 significantly increased microbial diversity. CMR dosage correlated with the yield-increasing effect in an inverted U-shaped curve, with the optimal dosage of 45 t/hm2. Principal component analysis indicated that CMR could reduce soil salt and nutrient content and improve soil microbial properties, thus effectively increase the yield. CMR applied at a dosage of 45 t/hm2 has the best yield-increasing effect because of its best improving effect on soil chemical and microbial properties.

Key words: Chinese medicine residue compost, application rate, tomato, soil properties, yield

CLC Number: