Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.fcr.2017.07.020 |
Disentangling the positive and negative effects of trees on maize performance in smallholdings of Northern Rwanda | |
Ndoli, Alain1,2; Baudron, Frederic2; Schut, Antonius G. T.1; Mukuralinda, Athanase3; Giller, Ken E.1 | |
通讯作者 | Ndoli, Alain |
来源期刊 | FIELD CROPS RESEARCH |
ISSN | 0378-4290 |
EISSN | 1872-6852 |
出版年 | 2017 |
卷号 | 213页码:1-11 |
英文摘要 | In the sub-humid parts of East Africa, high population density and pressure on land have led farmers to integrate multipurpose trees on farm. Although mixing trees and crops generates numerous benefits (e.g., fuelwood, timber), it often reduces crop yields. Whereas the effects of mature trees on crops are well studied in semi -arid parklands, there are only few studies for the sub-humid environment. The effects of mature Alnus acuminata (Kurth) and Markhamia lutea (Seem.) on crops were studied on-farm for four seasons in the sub-humid environment of northern Rwanda. Five sampling points for A. acuminata and M. lutea were: (i) 1 m from tree trunk without maize, (ii) 3 m from tree trunk without maize, (iii) 1 m from tree trunk with maize, (iv) 3 m from tree trunk with maize and (v) sole maize away from any tree. Nutrient availability and uptake, soil water, air temperature, solar radiation, crop growth and yields were measured. The APSIM-maize module was used to assess the sensitivity of maize yields to changes in these variables. Nutrients availability was higher under A. acuminata compared with M. lutea, because of higher litter fall but maize nutrient uptake increased only under A. acuminata 3 m from tree trunk during a wetter season. None of tree species affected water availability for maize in the topsoil. Photosynthetically active radiation (PAR), total solar radiation and day air temperature were reduced by both tree species. Maize crop at 1 m and 3 m from the tree trunk was shorter in height but had the same number and size of leaves when compared to sole maize plots. Crop yield was generally reduced more at 1 m than at 3 m from the tree trunk. A positive interaction between A. acuminata and maize was only apparent at 3 m from the tree in one of the four seasons following higher litter fall, suggesting that the negative effect of shade was offset by extra N input during that season. In a modelled scenario under low N fertilization, larger N input from trees could compensate for yield loss caused by reduction in radiation and temperature in about 60% of the seasons. Our findings suggest that adequate pruning and high leaf litter recycling can reduce the negative effect of shade in low intensity farming systems. |
英文关键词 | Agroforestry Microclimate Soil fertility Crop phenology Crop morphology |
类型 | Article |
语种 | 英语 |
国家 | Netherlands ; Zimbabwe ; Rwanda |
收录类别 | SCI-E |
WOS记录号 | WOS:000412610500001 |
WOS关键词 | AGROFORESTRY SYSTEMS ; SEMIARID KENYA ; CROP INTERACTIONS ; PARKLAND SYSTEM ; BURKINA-FASO ; WATER-USE ; GROWTH ; GREVILLEA ; PRODUCTIVITY ; MANAGEMENT |
WOS类目 | Agronomy |
WOS研究方向 | Agriculture |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/198929 |
作者单位 | 1.Wageningen Univ, Plant Prod Syst, POB 430, NL-6700 AK Wageningen, Netherlands; 2.CIMMYT, Southern Africa Reg Off, POB MP163,Peg Mazowe Rd, Harare, Zimbabwe; 3.World Agroforestry Ctr ICRAF, POB 227, Huye, Rwanda |
推荐引用方式 GB/T 7714 | Ndoli, Alain,Baudron, Frederic,Schut, Antonius G. T.,et al. Disentangling the positive and negative effects of trees on maize performance in smallholdings of Northern Rwanda[J],2017,213:1-11. |
APA | Ndoli, Alain,Baudron, Frederic,Schut, Antonius G. T.,Mukuralinda, Athanase,&Giller, Ken E..(2017).Disentangling the positive and negative effects of trees on maize performance in smallholdings of Northern Rwanda.FIELD CROPS RESEARCH,213,1-11. |
MLA | Ndoli, Alain,et al."Disentangling the positive and negative effects of trees on maize performance in smallholdings of Northern Rwanda".FIELD CROPS RESEARCH 213(2017):1-11. |
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