Fertilizer Conservation and Yield Enhancement on Single-cropping Rice Cultivation by <i>Azolla</i> Application

DENG Sufang; ZHAN Jie; YANG Yanqiu; ZHENG Huifen; YING Zhaoyang

doi:10.19303/j.issn.1008-0384.2022.007.017

Volume 37 Issue 7

Jul. 2022

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Article Navigation > Fujian Journal of Agricultural Sciences > 2022 > 37(7): 954-960

DENG S F, ZHAN J, YANG Y Q, et al. Fertilizer Conservation and Yield Enhancement on Single-cropping Rice Cultivation by Azolla Application [J]. Fujian Journal of Agricultural Sciences，2022，37（7）：954−960 doi: 10.19303/j.issn.1008-0384.2022.007.017

Citation:

DENG S F, ZHAN J, YANG Y Q, et al. Fertilizer Conservation and Yield Enhancement on Single-cropping Rice Cultivation by Azolla Application [J]. Fujian Journal of Agricultural Sciences，2022，37（7）：954−960 doi: 10.19303/j.issn.1008-0384.2022.007.017

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Fertilizer Conservation and Yield Enhancement on Single-cropping Rice Cultivation by Azolla Application

doi: 10.19303/j.issn.1008-0384.2022.007.017

DENG Sufang^{1, 2
,},
ZHAN Jie^{1, 2},
YANG Yanqiu^{1, 2},
ZHENG Huifen^{1, 2},
YING Zhaoyang^{1, 2
,
,}

1.
Agricultural Ecology Institute, Fujian Academy of Agricultural Sciences, Fuzhou, Fujian　350013, China
2.
National Azolla Germplasm Resource Center, Fuzhou, Fujian　350013, China

Received Date: 2022-02-24
Rev Recd Date: 2022-07-08

Available Online: 2022-08-07

Publish Date: 2022-07-28

Abstract

Abstract

Objective Effects of application of aquatic green manure Azolla on fertilizer use reduction and productivity improvement for single-cropping rice farming were studied. Method An experimentation using Azolla at a rate of 30 t·hm⁻² to replace 20%, 40%, and 60% N and K fertilizers was conducted. The resulting grain yield, plant biological characteristics, and soil fertility were monitored. Results In comparison to the conventional fertilization, the application of Azolla to achieve 20% reduction on the use of N and K fertilizers rendered significant increases on plant height, effective tillers count, and panicles per plant with an 11.11% rise on the crop yield (P＜0.05). The pH, organic matters, alkali-hydrolyzed N, available P, and readily available K of the treated soil were improved to varying extents. In general, plowing Azolla into the field significantly increased organic matters in the soil (P＜0.05). The treatment to reduce 60% use of conventional chemical fertilizers with Azolla (T6) made a significantly difference on the readily available K in soil (P＜0.05). Conclusion Application of Azolla at a rate of 30 t·hm⁻² to replace 20% of N and K for fertilization could significantly upgrade the soil fertility and increase the grain yield by 11.11%. It was considered an effective means not only to conserve fertilizer with green manure but also benefit the production of single-cropping rice farming.
- Green manure,
- Azolla,
- returning application,
- fertilizer reduction,
- soil fertility

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References(30)

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