Can smallholder farmers buffer rainfall variability through conservation agriculture? On-farm practices and maize yields in Kenya and Malawi

Can smallholder farmers buffer rainfall variability through conservation agriculture? On-farm practices and maize yields in Kenya and Malawi
复制标题

小农能否通过保护性农业缓冲降雨变化?

DOI:
10.1088/1748-9326/ab45ad
复制
发表时间:
2019
影响因子:
6.7
通讯作者:
Boillat S
Boillat S
中科院分区:
环境科学与生态学2区
文献类型:
--
作者:
Boillat S

文献摘要

参考文献

被引文献

相似文献

减少耕作、永久地被和作物多样化是保护性农业的三大核心支柱。我们评估和比较了在肯尼亚和马拉维ENSO驱动的降雨变率下,与CA三大支柱相关的不同做法对玉米产量的影响。在马拉维,在低于平均降雨量的情况下,减少耕作措施使每公顷产量平均增加250公斤,在肯尼亚,在降雨量高于平均降雨量的情况下,每公顷产量增加700公斤,但在肯尼亚降雨量低于平均降雨量的情况下,对产量没有任何显著影响。在马拉维(干旱条件),地被对产量有积极影响,但在肯尼亚(干燥和潮湿条件),地面覆盖对产量有积极影响,那里的混合作物和牲畜系统限制了这一做法。作物多样化在肯尼亚(干旱和潮湿条件下)产生了积极影响,在那里实行玉米-豆类作物轮作,但在马拉维没有,那里的土地占有量太小,不允许轮作。我们的研究结果表明,即使在可变降雨量条件下进行了几年的实践,孤立的CA技术也可以对产量产生积极的影响。这加强了支持CA在农业系统复原力建设中的价值的经验证据,并表明在气候变化导致更多变的降雨条件的地区,应支持完全和部分采用CA做法。
Reduced tillage, permanent ground cover and crop diversification are the three core pillars of Conservation Agriculture (CA). We assess and compare on-farm effects of different practices related to the three pillars of CA on maize yields under ENSO-driven rainfall variability in Kenya and Malawi. Reduced tillage practices increased yields per hectare by 250 kg on average in Malawi under below-average rainfall conditions and by 700 kg in Kenya under above-average rainfall, but did not have any significant effect on yields under below-average rainfall conditions in Kenya. Ground cover had a positive impact on yields in Malawi (dry conditions) but not in Kenya (both dry and wet conditions), where mixed crop and livestock systems limited this practice. Crop diversification had positive impacts in Kenya (both dry and wet conditions), where maize-legume crop rotation is practiced, but not in Malawi where landholdings are too small to allow rotation. Our findings suggest that isolated CA techniques can have positive effects on yields even after only a few years of practice under variable rainfall conditions. This strengthens empirical evidence supporting the value of CA in resilience building of agricultural systems, and suggests that both full and partial adoption of CA practices should be supported in areas where climate change is leading to more variable rainfall conditions.
“最长的歉收季节”:需要采取紧急行动来应对厄尔尼诺干旱对南部非洲造成的毁灭性人道主义影响
DOI: --
发表时间: 2016
期刊:
影响因子: --
作者:
E. Feeny;Tigere Chagutah
通讯作者: Tigere Chagutah
DOI: 10.1016/j.agee.2013.11.011
发表时间: 2014
期刊: Agriculture, Ecosystems & Environment
影响因子: --
作者:
T. Rosenstock;M. Mpanda;J. Rioux;E. Aynekulu;A. Kimaro;H. Neufeldt;K. Shepherd;E. Luedeling
通讯作者: E. Luedeling
DOI: 10.1016/j.fcr.2013.10.002
发表时间: 2014
影响因子: 5.8
作者:
B. Vanlauwe;J. Wendt;K. Giller;M. Corbeels;B. Gérard;C. Nolte
通讯作者: B. Vanlauwe;J. Wendt;K. Giller;M. Corbeels;B. Gérard;C. Nolte
DOI: 10.1111/j.2041-210x.2012.00261.x
发表时间: 2013-02-01
影响因子: 6.6
作者:
Nakagawa, Shinichi;Schielzeth, Holger
通讯作者: Schielzeth, Holger
厄尔尼诺现象的重创:马拉维的经验、应对和选择
DOI: --
发表时间: 2018
期刊:
影响因子: --
作者:
Blessings Nyanjagha Botha;F. Nkoka;Valens Mwumvaneza
通讯作者: Valens Mwumvaneza