Medium-term effects of conservation agriculture on soil quality

Medium-term effects of conservation agriculture on soil quality
复制标题

保护性农业对土壤质量的中期影响

DOI：
--
复制
发表时间：
2017
期刊：
影响因子：
--
通讯作者：
C. Thierfelder
C. Thierfelder
中科院分区：
--
文献类型：
--
作者：
I. Ligowe;P. Nalivata;J. Njoloma;W. Makumba;C. Thierfelder

文献摘要

被引文献

相似文献

低效的管理做法导致土壤有机质耗竭、结构破坏和侵蚀加剧。这导致撒哈拉以南非洲的作物产量低。保护性农业被认为是一种具有改良土壤质量和提供稳定产量能力的潜在农业系统。因此，在马拉维Chitedze研究站进行了一项研究，以评估为期5年的保护性耕作试验在改善土壤质量方面的中期效果。结果表明，保护地土壤养分积累是渐进的，从第4年开始，各处理间养分积累差异显著。在第5年，CA处理，平均注册的pH值和土壤有机质（SOM）分别比常规做法高14%和21%。第5年土壤有机质与pH值呈显著正相关（74%）。CA处理有一个范围内的61.2 - 69.4%的土壤颗粒组成的土壤团聚体直径大于2毫米相比，30.1%，在通常的做法下的第5年。在顶部30厘米的土壤，67和17 μ m的' m-2记录在CA和对照，分别。第5年玉米产量高于第1年。在所有评估的参数中，玉米-豇豆轮作处理的CA值最高。总之，保护性耕作改善了土壤质量，特别是在种植豆科作物时。 关键词：惯例，土壤团聚体稳定性。
Inefficient management practices lead to soil organic matter depletion, structure breakdown and increased erosion. This has resulted into low crop yields of sub-Saharan Africa. Conservation agriculture (CA) is being considered as a potential system having the capability of improving soil quality and providing stable yields. A study was therefore conducted, at Chitedze Research Station-Malawi, to evaluate medium term effects of 5 years CA experiment potential in improving soil quality. The results indicated that chemical nutrient build up in CA is gradual and significant differences between treatments were realized from the 4th year of practicing CA. In the 5th year, CA treatments, on average registered 14 and 21% higher in pH and soil organic matter (SOM) respectively than in the common practice. A positive correlation (74%) between soil SOM and pH in the 5th year was observed. CA treatments had a range of 61.2 - 69.4% of the soil particles composed of soil aggregates greater than 2 mm in diameter compared to 30.1% under common practice by the 5th year. In the top 30 cm of the soil, 67 and 17 earthworm’s’ m-2 were recorded in CA and control, respectively. Maize yields were higher in the 5th year as compared to the 1st year. In all the parameters assessed, CA using maize - cowpea rotation treatment gave highest values. Conclusively, CA improves soil quality, especially when legumes are integrated. Key words: Common practice, soil aggregate stability.