Effects of Different Organic Fertilizers on Improving Soil from Newly Reclaimed Land to Crop Soil

Xuqing Li, Yao Su, Temoor Ahmed, Haiying Ren, Muhammad Rizwan Javed, Yanlai Yao, Qianli An, Jianli Yan and Bin Li
Additional contact information
Xuqing Li: Institute of Vegetable, Hangzhou Academy of Agricultural Sciences, Hangzhou 310024, China
Yao Su: Institute of Environment, Resource, Soil and Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
Temoor Ahmed: Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China
Haiying Ren: The Institute of Horticulture, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
Muhammad Rizwan Javed: Department of Bioinformatics and Biotechnology, Government College University Faisalabad (GCUF), Allama Iqbal Road, Faisalabad 38000, Pakistan
Yanlai Yao: Institute of Environment, Resource, Soil and Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
Qianli An: Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China
Jianli Yan: Institute of Vegetable, Hangzhou Academy of Agricultural Sciences, Hangzhou 310024, China
Bin Li: Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China

Agriculture, 2021, vol. 11, issue 6, 1-15

Abstract: The rapid development of cities in the recent 10 years caused a reduction in the cultivated land area, which only accounts for 14% of the total land area in China. Land development and reclamation have been regarded as an effective way to compensate farmland occupation. However, most of the newly reclaimed land has poor soil fertility and suitability; in some cases, the production capacity is only 10–30% of the occupied farmland. In order to ameliorate the soil quality of the newly reclaimed land, this study evaluated the effects of commercial organic fertilizer (0.75, 1.50, and 2.25 kg/m 2 ), mushroom residue (1.50, 2.25, and 3.00 kg/m 2 ), biogas slurry (150, 225, and 300 kg/m 2 ), vegetable cake (0.30 and 0.60 kg/m 2 ), and chemical compound fertilizer (37.50 g/m 2 ) on the pH, moisture content and organic matter content (OMC), available phosphate, total nitrogen, alkaline hydrolysis nitrogen, microbial biomass carbon and nitrogen, and number of total bacteria and phosphate-solubilizing bacteria, as well as the growth of maize seedlings. The results from this study indicate that the soil quality (OMC is an indicator) was ameliorated by chemical and organic fertilizers, in particular commercial organic fertilizers, which caused a 9.35–16.35% increase in moisture content, a 11.56–18.72% increase in pH, a 1.73–2.15 fold increase in OMC, a 338.44–491.41% increase in available P, a 36.80–48.14% increase in total N, a 95.32–128.34% increase in alkaline hydrolysis N, a 92.57–178.38% increase in total bacterial numbers, and a 7.57–20.87 fold increase in microbial biomass carbon compared with the control. The pot experiment further indicated that soil amended with commercial organic fertilizers caused a 20.35–30.55% increase in the height and a 12.50–16.67% increase in the total dry weight of maize seedlings. In addition, representative strains with the ability to dissolve phosphorus and fix nitrogen were successfully isolated using the culture method, and were then identified based on colony morphological observation and 16S rDNA sequence analysis, which help us to not only understand why organic fertilizer has great effect on soil improvement, but also provides beneficial microbial resources for further study.

Keywords: soil fertility; soil organic matter; soil microbe; P-solubilizing bacteria; N-fixing bacteria; identification (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (5)

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