Litter production and litter dynamics in different agroforestry systems in the arid western region of India

IF 1.4 4区 农林科学 Q3 AGRONOMY
A. Verma, P. Kumar, M. L. Soni, Navraten Pawar, Upendra Pradhan, S. Tanwar, Shrawan Kumar
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引用次数: 2

Abstract

ABSTRACT Litterfall production, decomposition and nutrient release was investigated for three prominent agroforestry tree species, Prosopis cineraria, Tecomella undulata and Hardwickia binata, grown in the arid western region of India. The highest litterfall was recorded for H. binata (9.44 Mg ha−l y−1) followed by P. cineraria (8.94 Mg ha−l y−1) and T. undulata (3.74 Mg ha−l y−1). It took 15, 12 and 9 months for decomposition of 90% of the litter of H. binata, P. cineraria and T. undulata, respectively. Regression analysis showed that rainfall and air temperature had significant impacts on the decomposition process. Soil moisture and soil microbial biomass carbon showed high correlations (R2 > 0.70, p < 0.01) with litter decay. The rate of release of N (k N = 0.0014, surface (0–15 cm); k N = 0.0015, sub-surface (15–30 cm)) and K (k K = 0.0041, surface; k K = 0.0047, sub-surface) was highest from P. cineraria, whereas release rates of P were statistically equivalent for all species. N release from the decomposing litter increased initially, but then decreased as decomposition progressed. Concentrations of P, K and Mg in the litter decreased throughout the decomposition, with some fluctuations in P and Mg for P. cineraria and H. binata at the later stage. Ca release did not follow any specific trend. P. cineraria, with considerable amounts of litterfall, the highest nutrient inputs to the soil and the most rapid release of nutrients during the decomposition, was concluded to facilitate greater fertility build-up of the soil compared with the other two species.
印度西部干旱地区不同农林业系统凋落物产量和凋落物动态
摘要对印度西部干旱地区3种主要农林业树种Prosopis cineraria、Tecomella波动和Hardwickia binata凋落物的生成、分解和养分释放进行了研究。落叶量最大的是双生木(9.44 Mg ha - 1y - 1),其次是灰孢木(8.94 Mg ha - 1y - 1)和波柳木(3.74 Mg ha - 1y - 1)。褐飞蛾、灰灰飞蛾和波状飞蛾的90%凋落物分解时间分别为15、12和9个月。回归分析表明,降雨和气温对分解过程有显著影响。土壤水分和土壤微生物生物量碳与凋落物腐烂呈高度相关(R2 > 0.70, p < 0.01)。N的释放率(k N = 0.0014,表面(0-15 cm);k N = 0.0015,次表层(15-30 cm))和k (k k = 0.0041,表层;k k = 0.0047(亚表层)最高,而P的释放率在所有物种中具有统计学意义。凋落物N释放量先增加后减少。凋落物中P、K、Mg的浓度在整个分解过程中均呈下降趋势,在后期有一定的波动。Ca的发布没有遵循任何特定的趋势。结论认为,与其他两种植物相比,灰霉的凋落物量相当大,对土壤的养分输入最多,分解过程中养分释放最快,有利于土壤肥力的积累。
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来源期刊
Biological Agriculture & Horticulture
Biological Agriculture & Horticulture 农林科学-农艺学
CiteScore
3.30
自引率
6.70%
发文量
18
审稿时长
>36 weeks
期刊介绍: Biological Agriculture & Horticulture aims to act as the central focus for a wide range of studies into alternative systems of husbandry, and particularly the biological or organic approach to food production. The Journal publishes work of a sound scientific or economic nature related to any aspect of biological husbandry in agriculture, horticulture and forestry in both temperate and tropical conditions, including energy and water utilization, and environmental impact.
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