Pruning and green manure from Alnus acuminata improve soil health, and potato and wheat productivity in Rwanda

Author:

Cyamweshi Athanase R.1,Muthuri Catherine W.2,Kuyah Shem1,Mukuralinda Athanase2,Mbaraka Rumanzi S.3,Sileshi Gudeta W.4

Affiliation:

1. Jomo Kenyatta University of Agriculture and Technology (JKUAT)

2. World Agroforestry (ICRAF)

3. University of Rwanda

4. Addis Ababa University

Abstract

Abstract Alnus acuminata Kunth. (alnus) has been widely promoted under climate change mitigation and adaptation programs in the East African highlands. However, information is lacking on the impact of its pruning management and green manure (GM) application on soil health and the productivity of associated crops. Using a large suit of soil quality indicators, crop growth and yield measurements, this study identified appropriate combinations of alnus pruning levels and GM application for sustainable intensification of potato (Solanum tuberosum) and wheat (Triticum aestivum) production. This study compared six treatments, namely, (1) sole crops of potato or wheat (control), (2) sole crop + GM, (3) 75% pruning, (4) 75% pruning + GM, (5) 90% pruning and (6) 90% pruning + GM. The best treatments were the 75% pruning + GM and 90% pruning + GM, which significantly differed from the control in soil pH, soil organic carbon (SOC), total nitrogen (TN), total phosphorus (P), exchangeable calcium (Ca) contents, the N:P and C:P stoichiometric ratios and the soil structural stability index (SSI). These treatments increased soil pH by 5–6%, SOC by 74–82%, TN by 58–68%, exchangeable Ca by 76–81%, total P by 17–21%, the N:P ratio by 40%, C:P ratio by 43–51%, the SSI by 71–79%, potato tuber yields by 17–21% and wheat yields by 21–32% over the control. Therefore, it is concluded that pruning and application of alnus green manure have the potential to significantly improve soil health and crop productivity on degraded soils in the study area.

Publisher

Research Square Platform LLC

Reference47 articles.

1. Agricultural success from Africa: the case of fertilizer tree systems in southern Africa (Malawi, Tanzania, Mozambique, Zambia and Zimbabwe);Ajayi OC;Int J Agric Sustain,2011

2. Kinetin and spermine mediated induction of salt tolerance in wheat plants: Leaf area, photosynthesis and chloroplast ultrastructure of flag leaf at ear emergence;Aldesuquy H;Egypt J basic Appl Sci,2014

3. Influence of organic manure on the vegetative growth and tuber production of potato (Solanum tuberosum L var Spunta) in a Sahara desert region;Amara D;Int J Agric Crop Sci,2013

4. Soil texture analyses using a hydrometer: modification of the Bouyoucos method;Beretta AN;Cienc e Investig Agrar Rev Latinoam ciencias la Agric,2014

5. The role of soil carbon in natural climate solutions;Bossio DA;Nat Sustain,2020

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