Forage potential of sorghum-clover intercropping systems in semi-arid conditions

IF 1.2 4区 农林科学 Q2 AGRICULTURE, MULTIDISCIPLINARY Bragantia Pub Date : 2021-01-01 DOI:10.1590/1678-4499.20200423
Naghmeh Ashoori, Mehrdad Abdi, F. Golzardi, J. Ajalli, M. Ilkaee
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引用次数: 8

Abstract

To identify the optimum intercropping system of sorghum and clover in terms of quantity and quality of forage yield, a twoyear experiment was conducted in a semi-arid region of Iran, during the 2016 and 2017 growing seasons. Treatments consisted of eight cropping systems: S75C25 (75% sorghum + 25% clover), S50C50 and S25C75, as replacement series; S100C50, S50C100, and S100C100 as additive series; and sole cultures of sorghum and clover. The highest and lowest dry matter (DM) yield (29.17 and 10.71 Mg·ha-1) were found in the S100C100 and clover monoculture systems, respectively. Although the highest content of crude protein (CP) and digestible dry matter (DDM) were recorded from clover monoculture, the maximum yield of CP and DDM were obtained from the S100C100. Increasing the proportion of clover in intercropping decreased the acid detergent fiber and neutral detergent fiber, increased the relative feed value, net energy for lactation and dry matter intake. Increasing the proportion of sorghum in intercropping improved the yield of DM, CP and DDM. The land equivalent ratio for DM yield was higher than one in all intercropping treatments but were significantly higher in the additive intercropping systems. Overall, it could be concluded that sorghum and clover additive intercropping systems increased forage yield and quality, however if simultaneous increase of the quantity and quality of forage is the interest of this study then the S100C100 system had a significant advantage over other treatments and can be a suitable alternative for sorghum and clover monoculture systems in semi-arid regions.
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半干旱条件下高粱-三叶草间作系统的饲料潜力
为了确定高粱和三叶草在饲料产量和质量方面的最佳间作制度,在2016年和2017年生长季节在伊朗半干旱地区进行了为期两年的试验。处理包括8个种植系统:S75C25(75%高粱+ 25%三叶草)、S50C50和S25C75作为替代系列;S100C50、S50C100、S100C100系列添加剂;以及高粱和三叶草的单独栽培。S100C100和三叶草单作体系的干物质产量最高,分别为29.17和10.71 Mg·ha-1。单作三叶草的粗蛋白质(CP)和可消化干物质(DDM)含量最高,但粗蛋白质和可消化干物质的产量以S100C100最高。增加三叶草间作比例降低了酸性洗涤纤维和中性洗涤纤维,提高了相对饲料价值、泌乳净能和干物质采食量。增加间作高粱的比例可提高DM、CP和DDM的产量。干物质产量的土地当量比在所有间作处理中均高于1,但在添加间作系统中显著高于1。总体而言,可以得出结论,高粱和三叶草复合种植系统提高了饲料产量和质量,但如果同时提高饲料的数量和质量是本研究的兴趣,那么S100C100系统比其他处理具有显著优势,可以作为半干旱区高粱和三叶草单一栽培系统的合适替代方案。
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来源期刊
Bragantia
Bragantia AGRICULTURE, MULTIDISCIPLINARY-
CiteScore
2.40
自引率
8.30%
发文量
33
审稿时长
4 weeks
期刊介绍: Bragantia é uma revista de ciências agronômicas editada pelo Instituto Agronômico da Agência Paulista de Tecnologia dos Agronegócios, da Secretaria de Agricultura e Abastecimento do Estado de São Paulo, com o objetivo de publicar trabalhos científicos originais que contribuam para o desenvolvimento das ciências agronômicas. A revista é publicada desde 1941, tornando-se semestral em 1984, quadrimestral em 2001 e trimestral em 2005. É filiada à Associação Brasileira de Editores Científicos (ABEC).
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