ABSTRACT

Poor land utilization is always a concern in semi-arid regions. This study was conducted to examine the effect of different silvopastoral systems on soil chemical, biological and biochemical properties after 9 years of establishment. All studied soil properties were influenced by different land use systems except soil pH. Guava + pasture system recorded higher organic carbon [OC ~12 Mg ha^–1], N (~257 kg ha^–1), fungi (~43 × 10⁷ cfu g⁻¹ soil), alkaline (35.83 µg p-nitrophenyl g^–1 soil h^–1), and acid phosphatase (32.84 µg p-nitrophenyl g^–1 soil h^–1) activities compared to other land use systems. Whereas, microbial biomass carbon [MBC, ~92 mg kg^–1 soil] content and total bacteria (239 × 10⁷ cfu g⁻¹ soil) counts were higher under bael + pasture system. Increased soil pH (7.1 to 7.4) in the monoculture pasture system favored the P content (~35 kg ha^–1) over other land use systems. All the soil properties were higher in 0–15 cm compared to 15–30 cm depth. Our results demonstrate that for the resilience of key soil health indicators, the long-term guava + pasture and bael + pasture systems can be a promising option for semi-arid environment.

摘要

在半干旱地区，土地利用率低一直是一个问题。本研究旨在检验不同林牧系统在建立 9 年后对土壤化学、生物和生化特性的影响。除土壤 pH 值外，所有研究的土壤特性都受不同土地利用系统的影响。番石榴 + 牧场系统记录了更高的有机碳 [OC ~12 Mg ha ^–1 ]、N（~257 kg ha ^–1）、真菌（~43 × 10 ⁷ cfu g ^-1土壤）、碱性（35.83 µg 对硝基苯基 g ^–1土壤 h ^–1）和酸性磷酸酶（32.84 µg 对硝基苯基 g ^–1土壤 h ^–1) 与其他土地利用系统相比的活动。而微生物生物量碳 [MBC，~92 mg kg ^–1土壤] 含量和总细菌（239 × 10 ⁷ cfu g ^-1土壤）计数在 bael + 牧场系统下更高。与其他土地利用系统相比，单一栽培牧场系统中土壤 pH 值的增加（7.1 至 7.4）有利于 P 含量（~35 kg ha ^–1）。与 15-30 厘米深度相比，0-15 厘米的所有土壤特性都较高。我们的结果表明，对于关键土壤健康指标的恢复力，长期番石榴+牧场和贝尔+牧场系统可能是半干旱环境的一个有前途的选择。