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首页> 外文期刊>Agronomia Costarricense >Development of indicators for sustainable agriculture for the Reventado river watershed, Cartago, Costa Rica.
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Development of indicators for sustainable agriculture for the Reventado river watershed, Cartago, Costa Rica.

机译：为哥斯达黎加卡塔哥的雷文多多河流域开发可持续农业指标。

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This work was designed to generate sustainability indicators for the agricultural sector of the Reventado River watershed, Costa Rica. Land use through time increased soil cations accumulation (Ca, Mg and K) but decreased acidity saturation as a result of fertilizer and lime applications. Available P also increased with the period of land use, increasing at an approximated rate of 2.3 mg litre-1 year-1. The increase of P with time might allow the farmers to reduce its application to reduce costs and improve sustainability of the ago-ecosystem. Most farms suffered moderate rates of erosion. As erosion rates increased, the thickness of the A horizon and available P contents diminished, all of this while erosion rates increased from nil, to moderate to severe. Better soil structural index values were found in soil capability classes II and III, while in higher capability classes' structure was weaker and soils more susceptible to erosion. No significant differences were found between land capability classes and crop yields. Both potato (Solanum tuberosum) and onion (Allium cepa) yields were better in irrigated fields, the fact reflected also in higher B:C ratios, particularly around Tierra Blanca. Economical and social indicators of the study were positive but environmental indicators were negative for Tierra Blanca and Llano Grande communities. However, agricultural activities are an attractive and economic possibility for farmers at the Reventado River watershed.
机译：这项工作的目的是为哥斯达黎加的雷文达多河流域的农业部门产生可持续性指标。随着时间的推移，土地使用增加了土壤阳离子的积累（Ca，Mg和K），但由于施用了肥料和石灰，降低了酸度饱和度。有效磷也随着土地使用时间的增加而增加，大约以2.3 mg litre -1 年 -1 的速度增加。随着时间的推移，磷的增加可能使农民减少其施用量，从而降低成本并提高以前生态系统的可持续性。大多数农场遭受了中等程度的侵蚀。随着侵蚀速率的增加，A层的厚度和有效P含量减小，所有这些同时侵蚀速率从零增加到中度到严重。在土壤能力等级II和III中发现更好的土壤结构指标值，而在能力等级更高的土壤中，结构更弱，土壤更容易受到侵蚀。土地能力等级和农作物产量之间没有发现显着差异。灌溉田的马铃薯（Solanum tuberosum ）和洋葱（ Allium cepa ）的产量都更高，这一事实也反映在更高的B：C比上，特别是在Tierra Blanca附近。该研究的经济和社会指标是正面的，而环境指标对蒂拉布兰卡和格兰德社区则为阴性。但是，农业活动对于雷文杜多河流域的农民来说是一种有吸引力的经济可能性。

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