哥伦比亚咖啡区气候变率下土壤脆弱性指数

Luz Adriana Lince-Salazar, Siavosh Sadeghian-Khalajabadi, Vanessa Catalina Díaz-Poveda
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摘要

全球气候变化是威胁农业的主要因素之一。在这种情况下,降水变化对土壤肥力、植物养分有效性和侵蚀的影响最大。这项研究旨在评估哥伦比亚中部咖啡种植区土壤对气候变化的脆弱性。本研究分析了受极端高降水和低降水事件影响的咖啡生产系统可持续性的土壤成分。构建了3个敏感性指标,分别采用加权聚合结构和专家知识定义的权重值进行评价。这些指数是通过随机选择里萨拉尔达省巴尔博亚和桑图里奥市以及卡尔达斯省萨拉米纳市的432个咖啡农场来估计的。3市土壤养分有效性和保持脆弱性指数为中等(Balboa=2.87,变异系数- cv为13%;Santuario=2.88, CV为10%;萨拉米纳=2.9,CV为9%)。土壤淋溶脆弱性指数在巴尔博亚(4.33,CV 3%)和萨拉米纳(4.74,CV 7%)极低,在桑图里奥(3.57,CV 19%)较低。巴尔博亚和萨拉米纳的土壤流失脆弱性指数较低(3.32,CV 10.03%),分别为3.49和11.43%;桑图里奥的土壤流失脆弱性指数中等(3.13,CV 9.34%)。Balboa和Salamina地区咖啡种植土壤对气候变率的脆弱性较低,分别为3.33和3.45,Santuario地区为3.09。基于这些结果,在这三个城市,咖啡种植者必须通过适当管理肥料、土壤调理剂和堆肥的来源和剂量,以及实施杂草和凋落物的综合管理,引入农业实践,以提高土壤的恢复能力,降低土壤对极端高降水和低降水的脆弱性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Soil vulnerability index to climatic variability in coffee regions of Colombia
Global climate change is one of the main factors threatening agriculture. In this context, variations in precipitation have the strongest effect on soil fertility, plant nutrient availability, and erosion. This research aimed to assess soil vulnerability to climate variability in the central coffee-growing region of Colombia. This study analyzed soil components involved in the sustainability of the coffee production system as affected by extreme high and low precipitation events. For evaluation, three sensitivity indices were constructed, with a weighted aggregation structure and with weight values defined from expert knowledge. The indices were estimated by randomly selecting 432 coffee farms in the municipalities of Balboa and Santuario in Risaralda department and Salamina in Caldas department. The soil nutrient availability and conservation vulnerability index was moderate in the three municipalities (Balboa=2.87 and coefficient of variation-CV 13%; Santuario=2.88 and CV 10%; Salamina=2.9 and CV 9%). The soil leaching vulnerability index was very low in Balboa (4.33 and CV 3%) and Salamina (4.74 and CV 7%) and low in Santuario (3.57 and CV 19%). The soil loss vulnerability index was low in Balboa (3.32 and CV 10.03%) and Salamina (3.49 and CV 11.43%) and moderate in Santuario (3.13 and CV 9.34%). Lastly, the vulnerability of coffee-growing soil to climate variability was low in Balboa (3.33) and Salamina (3.45) and moderate in Santuario (3.09). Based on these results, in the three municipalities, coffee growers must introduce farming practices towards improving soil resilience and decreasing soil vulnerability to high and low precipitation extremes by adequately managing the sources and doses of fertilizers, soil conditioners, and compost and by implementing integrated management of weeds and litterfall.
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