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Evaluation of Tree Species for Agroforestry Practice on Entisols in the Sudan Sahel Region of Nigeria

机译:尼日利亚苏丹萨赫勒地区对以树胶进行农林业综合种植的树种评价

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1) Background: Evaluation of Acacia nilotica, Acacia Senegal, Azadirachta indica, Eucalyptus camaldulensis, Khaya senegalensis, Leucaena leucocephala and Prosopis juliflora for growth and interactions with soil and crops for agroforestry development was undertaken on Entisols in the Sudan Sahel region of North Eastern Nigeria. One hundred trees of each species were established at 2 x 2m spacing on a sandy loam entisol by intercropping with beans (Vigna unguiculata) for the initial 2 years. Tree growth was regularly recorded and changes in soil properties as well as yield of Sorghum vulgare on them also evaluated. 2) Results: The tree species recorded more than 60% survival and grew rapidly. The highest annual mean tree girth growth rate of 3.65cm occurred in Leucaena leucocephala, followed by Acacia nilotica (3.61cm), Azadirachta indica (3.01cm), Eucalyptus camaldulensis (2.78cm), Khaya senegalensis (2.72cm), Acacia Senegal (2.55cm) and Prosopis juliflora (2.23cm). The trees accumulated sand and improved nutrient status of the soil under them. Sorghum vulgare crop grown on the forest soils produced higher dry matter yield than the surrounding field soil. The best crop yield of 3.22 g/plant occurred on Leucaena leucocephala soil, followed by Azadirachta indica (2.92 g/plant), Acacia nilotica (2.33 g/plant), Eucalyptus camaldulensis (2.22 g/plant), Prosopis juliflora (1.80 g/plant), Acacia Senegal (1.71 g/plant), the control (1.59 g/plant) and Khaya senegalensis (1.22 g/plant). 3)Conclusions: The study ranked species according to their growth and agroforestry qualities. It also observed some inter-tree species interactions which, when fully developed, will be very useful for scientific management of mixed species tropical agroforests.
机译:1)背景:在北部苏丹的苏丹萨赫勒地区,对尼日利亚的恩蒂索尔地区进行了评估,评估了相思树,塞内加尔相思树,印za,印加桉树,卡纽杜勒桉,塞内加尔海藻,白叶银合欢和水生农作物的相互作用。 。在最初的两年中,通过与豆类(Vigna unguiculata)间作,在沙质壤土香附上以2 x 2m的间隔建立了每个树种的一百棵树。定期记录树木的生长情况,并评估土壤特性以及高粱的产量。 2)结果:这些树种的存活率超过60%,并且增长迅速。银合欢的年平均树木周长最高增长率为3.65cm,其次是尼古拉相思树(3.61cm),印度印za(3.01cm),卡姆杜利亚桉(2.78cm),塞内加尔海牙(2.72cm),塞内加尔相思(2.55)厘米)和Prosopis juliflora(2.23厘米)。树木积聚了沙子并改善了其下土壤的养分状况。在森林土壤上种植的高粱可以产生比周围田间土壤更高的干物质产量。最佳作物产量为3.22 g /株,发生在白花白桦土壤上,其次是印度的Azadirachta(2.92 g /株),尼加的刺槐(2.33 g /株),camaldulensis桉(2.22 g /株),Jusflora juliflora(1.80 g / ),塞内加尔相思(1.71克/植物),对照(1.59克/植物)和塞内加尔Khaya(1.22克/植物)。 3)结论:该研究根据物种的生长和农林业质量对物种进行了排名。它还观察到了一些树间物种之间的相互作用,这些相互作用在充分发展后,对于科学管理混合物种热带农林非常有用。

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