| Characteristics of physicochemical properties, enzyme activities and heavy metal changes of seed maize field under continuous application of agricultural waste compost |
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| DOI：10.7606/j.issn.1000-7601.2022.06.15 |
| Key Words: agricultural waste compost physicochemical properties enzyme activity heavy metal |
| Author Name | Affiliation | | PAN Yanhua | Jiuquan Seed Management Station, Jiuquan, Gansu 735000, China | | CAO Liguo | Gansu Jiuyu Seed Industry Co., Ltd., Jiuquan, Gansu 735000, China | | XUE Zhijun | Jiuquan Kaidi Agricultural Science and Technology Development Co., Ltd., Lanzhou, Gansu 735000, China | | HE Yong | Gansu Jiuyu Seed Industry Co., Ltd., Jiuquan, Gansu 735000, China | | WANG Qiang | Gansu Jiuyu Seed Industry Co., Ltd., Jiuquan, Gansu 735000, China | | ZHANG Wenjing | Gansu Jiuyu Seed Industry Co., Ltd., Jiuquan, Gansu 735000, China | | XIA Shangyou | Agricultural Technology Extension Service Center of Suzhou District, Jiuquan, Gansu 735000, China | | ZHENG Rong | Jiuquan Academy of Agricultural Sciences, Jiuquan, Gansu 735000, China | | WANG Xueqiang | Jiuquan Academy of Agricultural Sciences, Jiuquan, Gansu 735000, China |
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| Abstract: |
| Physical and chemical properties, enzyme activities and heavy metal changes in the seed production maize field of Gansu Province applied with agricultural waste compost for 4 years were studied. The results showed that the dosage ratio of agricultural waste was 18 t·hm-2 in straw group, 36 t·hm-2 in livestock and poultry manure group, and 15 t·hm-2 in waste residue group. In addition, the bulk density, pH value and fungus quantity of maize seed production group decreased by 6.77%, 6.20% and 26.19% compared with that without the waste compost. Total porosity, water\|stable aggregate, total water holding capacity, EC value, soluble salt and CEC increased by 6.63%, 18.95%, 6.62%, 5.23%, 5.36% and 36.10%. The contents of organic matter, organic carbon, organic carbon density, alkali\|hydrolyzed nitrogen, available phosphorus and available potassium increased by 23.72%, 24.10%, 15.48%, 28.44%, 49.92% and 27.97%. The number of bacteria, actinomycetes, activities of sucrase, urease, phosphatase and polyphenol oxidase increased by 38.20%, 86.60%, 63.46%, 38.89%, 61.48% and 58.82%; The contents of Hg, Cd, Cr, Pb and Zn increased by 21.74%, 30.00%, 24.49%, 27.55% and 31.81%. Agricultural waste compost using fixed number of years with seed corn field bulk density, pH value and the number of fungi was significantly negatively correlated, and the aggregate total porosity, water stability, the soluble salt, CEC, EC value, the total water holding capacity, organic matter, organic carbon density, available N,P,K content, number of bacteria, actinomyces, enzyme activity, heavy metals contentwas significantly positively correlated. Although the heavy metal content of maize field with agricultural waste compost was higher than that without the waste compost for 4 consecutive years, the heavy metal content was lower than the critical value of soil pollution, indicating that the heavy metal content of maize field with agricultural waste compost in the study area was low and would not pose a risk to crops. |
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