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| Effects of buried straw bioreactor technology on the production of winter greenhouse eggplant and the soil microenvironment |
| Received:October 10, 2018 |
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| KeyWord:buried straw bioreactor;greenhouse;eggplant;CO2 flux;soil microorganism |
| Author Name | Affiliation | E-mail | | DUAN Xiao-ting | School of Environment and Resources, Zhejiang A & F University, Hangzhou 311300, China
Institute of Environmental, Resources, Soil and Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China | | | YE Jing | Institute of Environmental, Resources, Soil and Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China | yejing@zaas.ac.cn | | LIN Hui | Institute of Environmental, Resources, Soil and Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China | | | ZOU Ping | Institute of Environmental, Resources, Soil and Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China | | | SUN Wan-chun | Institute of Environmental, Resources, Soil and Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China | | | MA Jun-wei | Institute of Environmental, Resources, Soil and Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China | | | FU Jian-rong | Institute of Environmental, Resources, Soil and Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China | fujr@zaas.ac.cn |
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| Abstract: |
| In order to investigate the effects of different straw bioreactor technologies on greenhouse eggplant production and the soil microenvironment, four treatments were set up in this experiment, namely CK, T1 (straw 22 500 kg·hm-2), T2 (straw 22 500 kg·hm-2 + microbial inoculants 60 kg·hm-2 + sheep dung 7800 kg·hm-2), and T3 (straw 22 500 kg·hm-2 + microbial inoculants 60 kg·hm-2+ sheep dung 7800 kg·hm-2 + humic acid 750 kg·hm-2). The results showed that the yield of eggplant could be increased by 29.2%~32.0% under the different straw bioreactor treatments compared with that of CK, but there was no significant difference in eggplant yield between the different straw bioreactor treatments. The bioreactor technology increased the concentration of total soluble sugar, vitamin C, and solids, and decreased the nitrate content in eggplant. The three straw bioreactor technologies effectively increased the average greenhouse soil CO2 flux and the soil organic carbon and total nitrogen contents. The amendment of organic fertilizers and microbial inoculants promoted CO2 release in the early growing stage of the greenhouse eggplant, which was beneficial to soil organic carbon and nutrient accumulation. The addition of humic acid had little effect on the greenhouse CO2 production, but it could improve soil microbial activities. Further analysis of soil microbial quantity showed that the straw bioreactor increased the quantity of fungi in the rhizosphere and reduced the quantity of soil bacteria. Treatment T3 tended to increase the quantity of soil fungi at the seedling stage and the quantity of soil bacteria at the flowering stage, while treatment T2 tended to increase the quantity of soil fungi at the flowering and fruiting stages and the quantity of soil bacteria during the fruiting period. Our results indicated that the straw bioreactor could significantly improve the yield and quality of eggplant, increase the average greenhouse soil CO2 flux, and increase the soil organic carbon and total nitrogen contents around the root system. The straw bioreactor could also influence soil microbial metabolic activities via microbial community changes during the cultivation process. |
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