Knowledge Resource Center for Ecological Environment in Arid Area
| 项目编号 | 1015468 |
| Increasing the Resilience of Agroecosystems in Puerto Rico to Climate Change by Combining Soil Conservation and Rainwater Harvesting Practices | |
| Dumas, Jose | |
| 主持机构 | SAES - UNIVERSITY OF PUERTO RICO |
| 开始日期 | 2018 |
| 结束日期 | 2023 |
| 资助机构 | US-NIFA（美国食品与农业研究所） |
| 语种 | 英语 |
| 国家 | 美国 |
| 中文简介 | 3010 - Economics |
| 英文简介 | Goals / Objectives The goal of the project is to develop field procedures that promote soil carbon sequestration, enhance water storage at ground level and simultaneously improve soil health. The work will be carried out using three crops of local and global socioeconomic importance, seeking to enhance their long-term productivity by increasing the resilience of the agroecosystems under climate changes. Four strategies will be implemented at the field level to attain the goal. They are: 1) use of low impact tillage; 2) engineering the land for water conservation; 3) increased nutrient retention in the surface soil; and 4) establishment of cover crops at a propitious time for nutrient recycling. All four factors combined should significantly enhance water conservation, improve soil organic matter dynamics at various depths in the root zone and promote efficient nutrient recycling.Project Methods We will establish the project in three agricultural regions of Puerto Rico, which have different climatic conditions. Each experiment will be independent of the other. The first study area will be at Adjuntas Agricultural Experiment Station, the second, at AgroTropical farm in Santa Isabel, and the third, at El Josco Bravo farm in Toa Alta. The land will be designed to channel rainwater in below-ground tunnels, with a Keyline plow, a low impact tillage tool. Nutrient retention of the ground surface will occur by the use of compost-biochar. Afterwards, five soil management practices (SMP), consisting of shallow-rooted cover crops (I-), bare soil (II-), shallow-rooted cover cropsGoals /tap-rooted cover crops (III-), tap-rooted cover crops (IV-), and non-conservation practice (V-) will be evaluated. Physical, biological and chemical properties of the soil will be studied before and after treatments to assess their effects on soil health. Undisturbed soil cores will be taken to characterize soil bulk density, soil moisture release curves, and to calculate available water content, aggregate stability, and hydraulic conductivity. The biological parameters will include soil respiration and key soil enzymes associated with soil health quality, which include DHA, Urease, and glucosidase. Chemical parameters will be soil acidity, exchangeable bases, exchangeable anions (NH4, NO3, and PO4), cation exchangeable capacity and soil organic matter fractions. The recalcitrance of SOM will be evaluated by the E4Goals /E6 ratio in UVGoals /VIS analysis; the aromatic to aliphatic ratio assessed by FTIR and its hydrophilicGoals /hydrophobic proportion by the use of a gradient step analysis by using UPLC-PDA. Soils with optimal values of the parameters mentioned should have the more significant resilience to the drier climates expected in tropical areas.The success of efforts to deliver the knowledge gathered during the project and growers' adoption of practices developed depends on the joint work of participating scientists, extension agents and farmers. We have strong connections with agroecological stakeholder farmers with experience in research and outreach education, who have previously worked with us and understand the importance of coordinating their profitable business work with our research and outreach activities. We will make field trips and conduct workshops for Agricultural Extension agents and NRCS agronomists for them to learn and to encourage the dissemination of practices designed during the project. As a result, they will help coordinate field trips for farmers. Following these activities we will use a questionnaire to evaluate the success in implementing the practices developed. After the first two years of the project, the community will receive the information through educational training at El Josco Bravo farm. The Josco Bravo farm has already established a successful agroecology program. |
| 英文关键词 | keyline rainwater harvesting cover crops recalcitrant soil organic matter soil water retention |
| 来源学科分类 | 3010 - Economics |
| 资源类型 | 项目 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/356106 |
| 推荐引用方式 GB/T 7714 | Dumas, Jose.Increasing the Resilience of Agroecosystems in Puerto Rico to Climate Change by Combining Soil Conservation and Rainwater Harvesting Practices.2018. |
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