Effects of different roostertree (Calotropis procera) amounts and spatial arrangements on the performance of the beet-cowpea intercropping system

E. C. C. Moraes, J. D. Lima, F. B. Neto, Paulo Cássio Alves Linhares, Arnaldo Pantoja da Costa, Joabe Freitas Crispim, Lissa Izabel Ferreira de Andrade, G. Rodrigues
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引用次数: 4

Abstract

Intercropping of beet with cowpea-vegetable is increasing in the State of Rio Grande do Norte, Brazil. However, its management requires scientific information and technologies pertaining to space arrangement and adequate fertilization with roostertree. The present study evaluated the agronomic/biological performance of the beet and cowpea-vegetable intercropping system with different amounts of roostertree and spatial arrangements of the component cultures. We established a 4 × 3 factorial completely randomized design with four blocks. The first factor was the amount of roostertree biomass incorporated into the soil (20, 35, 50, and 65 t ha-1 in dry matter), while the second was the spatial arrangement of beet rows alternated with cowpea rows (2:2, 3:3, and 4:4). We evaluated the total, commercial, and classified productivities of beet roots, as well as the number of green pods per m2, green and dry pod productivities, the number of green grains per pod, the weight of 100 green grains, and green and dry grain productive of cowpea. The agronomic efficiency of the intercropping system was evaluated by the land equivalent ratio, productive efficiency index, and score of the canonical variable z. The results showed no significant interactions among the amounts of roostertree biomass and spatial arrangements for any evaluated trait or agronomic index. The highest agronomic efficiency of the intercropping system was obtained with 65 t ha-1 of roostertree biomass and the 2:2 spatial arrangements.
不同红豆杉数量和空间安排对甜菜-豇豆间作系统生产性能的影响
在巴西北部大德州,甜菜与豇豆蔬菜的间作正在增加。然而,其管理需要科学的信息和技术,与空间安排和充分施肥有关。本研究评价了不同家禽树数量和不同组培空间安排的甜菜、豇豆蔬菜间作系统的农艺生物学性能。我们建立了一个4 × 3因子完全随机设计,有4个区。第一个影响因素是土壤吸收的鸡树生物量(干物质20、35、50和65 t hm -1),第二个影响因素是甜菜行与豇豆行交替的空间安排(2:2、3:3和4:4)。我们评估了甜菜根的总生产力、商业生产力和分类生产力,以及每平方米绿荚数、绿荚和干荚生产力、每荚绿粒数、100粒绿粒重和豇豆的绿粒和干粒产量。采用土地等效比、生产效率指数和典型变量z得分评价间作制度的农艺效率。结果表明,各评价性状和农艺指数的空间布局与红豆杉生物量之间没有显著的交互作用。以65 t hm -1的生物量和2:2的空间布局为宜,间作系统的农艺效率最高。
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