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Environmental and economic benefits of micro–field rain–harvesting farming system at maize (Zea mays L.) field scale in semiarid east African Plateau

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  • Mo, Fei
  • Wang, Jian-Yong
  • Ren, Hong-Xu
  • Sun, Guo-Jun
  • Kavagi, Levis
  • Zhou, Hong
  • Nguluu, Simon N.
  • Gicheru, Patrick
  • Cheruiyot, Kiprotich W.
  • Xiong, You-Cai

Abstract

To explore low–cost, high–yielding and environment–friendly rainfed farming technology is critical for sustainable agricultural development in semiarid east African Plateau (EAP). An innovative ridge–furrow mulching system (RFMS) was first introduced to EAP, with a two–year field experiment using maize cultivar KDVI in a typical semiarid site of Kenya from 2012 to 2013. Nine treatments were designed including ridge–furrow cultivation with black plastic mulching (RFB), straw mulching (RFS) and without mulching (RF) under high (375 kg ha−1), conventional (225 kg ha−1) and zero fertilization rates. We found RFB and RFS significantly increased soil water storage (0–40 cm) by 10.2% and 4.8%, while lowered evapotranspiration rate and improved thermal status, compared to RF across two growing seasons. Importantly, RFB and RFS increased soil organic carbon and C/N ratio (soil organic carbon/soil total nitrogen) by 7.8% and 4.9%, 7.2% and 5.1% respectively, following two growing seasons of farming practice. As expected, grain yield and water use efficiency (WUE) were averagely increased by 63.3% and 63.8%, 27.5% and 35.9% in RFB and RFS than those of RF respectively. Additionally, net income and economic output–to–input ratio were significantly greater in RFB and RFS than those of RF. On the other hand, conventional fertilization rate achieved similar grain yield and WUE as high fertilization did. Considering environmental and economic benefits, the RFMS farming system with conventional fertilization may act as a promising option to upgrade local dryland agricultural system in EAP.

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  • Mo, Fei & Wang, Jian-Yong & Ren, Hong-Xu & Sun, Guo-Jun & Kavagi, Levis & Zhou, Hong & Nguluu, Simon N. & Gicheru, Patrick & Cheruiyot, Kiprotich W. & Xiong, You-Cai, 2018. "Environmental and economic benefits of micro–field rain–harvesting farming system at maize (Zea mays L.) field scale in semiarid east African Plateau," Agricultural Water Management, Elsevier, vol. 206(C), pages 102-112.
    • Handle: RePEc:eee:agiwat:v:206:y:2018:i:c:p:102-112
    DOI: 10.1016/j.agwat.2018.05.002
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    2. Munyasya, Alex Ndolo & Koskei, Kiprotich & Zhou, Rui & Liu, Shu-Tong & Indoshi, Sylvia Ngaira & Wang, Wei & Zhang, Xu-Cheng & Cheruiyot, Wesly Kiprotich & Mburu, David Mwehia & Nyende, Aggrey Bernard , 2022. "Integrated on-site & off-site rainwater-harvesting system boosts rainfed maize production for better adaptation to climate change," Agricultural Water Management, Elsevier, vol. 269(C).
    3. Zhang, Guangxin & Dai, Rongcheng & Ma, Wenzhuo & Fan, Hengzhi & Meng, Wenhui & Han, Juan & Liao, Yuncheng, 2022. "Optimizing the ridge–furrow ratio and nitrogen application rate can increase the grain yield and water use efficiency of rain-fed spring maize in the Loess Plateau region of China," Agricultural Water Management, Elsevier, vol. 262(C).
    4. Liu, Ziqiang & Jia, Guodong & Yu, Xinxiao, 2020. "Water uptake and WUE of Apple tree-Corn Agroforestry in the Loess hilly region of China," Agricultural Water Management, Elsevier, vol. 234(C).
    5. Duan, Chenxiao & Chen, Guangjie & Hu, Yajin & Wu, Shufang & Feng, Hao & Dong, Qin’ge, 2021. "Alternating wide ridges and narrow furrows with film mulching improves soil hydrothermal conditions and maize water use efficiency in dry sub-humid regions," Agricultural Water Management, Elsevier, vol. 245(C).

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