CROP-TREE INTERACTIONS IN ALLEY CROPPING SYSTEMS ON ALLUVIAL SOILS OF THE UPPER AMAZON BASIN

被引：27

作者：

SALAZAR, A

SZOTT, LT

PALM, CA

机构：

[1] Instituto Nacional de Investigación Agropecuaria y Agroindustrial, Yurimaguas

[2] Department of Soil Science, N.C. State University, Raleigh, NC

来源：

AGROFORESTRY SYSTEMS | 1993年 / 22卷 / 01期

关键词：

ALLEY CROPPING; COMPETITION; NUTRIENT BUDGETS; WEED CONTROL;

D O I：

10.1007/BF00707472

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

A crop/hedgerow interface design was used to test three leguminous species, Inga edulis, Leucaena leucocephala and Erythrina sp., for their potential use for alley cropping on alluvial soils in the upper Amazon Basin. Prunings were applied as mulch at three rates 0, 3.3 and 6.7 Mg dry matter/ha/crop. Competition, crop yields, nutrient budgets, and weed control were monitored for three consecutive crops of upland rice. Crop yield reductions were evident up to 1.5 m from each of the hedgerow species, but were more pronounced with Leucaena hedgerows. Additional mulch was able to compensate for these reduced yields close to the hedges in Leucaena leucocephala and Erythrina but not in Inga edulis systems. In general rice yields were higher with Leucaena leucocephala and Erythrina mulch as compared to Inga mulch, perhaps because of higher levels of available N provided by the rapidly decomposing leaves of Leucaena leucocephala and Erythrina sp. as compared to Inga. Weed control was greater, however, with the slowly decomposing Inga mulch. For all three hedgerow/crop systems there was a net export of P from the system which was exhibited by declining soil P levels and decreasing crop yields.

引用

页码：67 / 82

页数：16

共 13 条

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