Peter Bolo, Monicah Mucheru-Muna, Michael Kinyua, George Ayaga, Sylvia Nyawira, Job Kihara
{"title":"长期土壤肥力综合管理措施下的氮磷矿化度及其相应的货币价值","authors":"Peter Bolo, Monicah Mucheru-Muna, Michael Kinyua, George Ayaga, Sylvia Nyawira, Job Kihara","doi":"10.1002/sae2.12100","DOIUrl":null,"url":null,"abstract":"<div>\n \n \n <section>\n \n <h3> Introduction</h3>\n \n <p>Nitrogen (N) and phosphorus (P) are essential nutrients for plant growth, commonly supplied through costly inorganic amendments. However, despite the benefits of nutrient mineralisation, there is limited quantitative information on its monetary value, and the extent of associated potential financial relief to smallholder farmers, particularly in western Kenya region.</p>\n </section>\n \n <section>\n \n <h3> Materials and Methods</h3>\n \n <p>This study used in situ resin core method to explore the extent of N and P nutrient mineralisation and monetary equivalents under select integrated soil fertility management (ISFM) practices in two long-term (17 years) trials namely Conservation Tillage (CT1) and Integrated Nutrient Management (INM3).</p>\n </section>\n \n <section>\n \n <h3> Results</h3>\n \n <p>FYM addition increased various soil chemical parameters while sole fertiliser (NPK) reduced soil pH and soil organic carbon (SOC). Phosphorus application was associated with increased P availabillity and its monetary value within the first month (0.29 kg P ha<sup>−1</sup>; USD 1.13 ha<sup>−1</sup>) and second month (1.22 kg P ha<sup>−1</sup>; USD 4.76 ha<sup>−1</sup>) of incubation. The quantities of N mineralised, and their monetary equivalents varied with fertiliser application and incubation times. Nitrogen fertilisation depressed P mineralisation and monetary benefits. FYM application increased P mineralisation and its monetary value within 30 (0.78 kg ha<sup>−1</sup>; ~USD 3.02 ha<sup>−1</sup>) and 60 (1.22 kg ha<sup>−1</sup>; ~USD 4.76) days of incubation. Residue application increased mineralised N (17.48 kg ha<sup>−1</sup>; ~USD 22.79 ha<sup>−1</sup>) after 60 days. Maize and soybean intercropping increased N mineralisation (45.81 kg N ha<sup>−1</sup>) and monetary value (USD 59.76 ha<sup>−1</sup>). SOC and other soil variables, their stoichiometry ratios and N mineralisation were significantly correlated. Combined NPK and FYM application significantly (<i>p</i> ≤ 0.05) increased maize yields and grain prices.</p>\n </section>\n \n <section>\n \n <h3> Conclusion</h3>\n \n <p>These findings reflect potential nutrient-based economic advantages of ISFM practices to resource-limited smallholder farmers. Combined application of NPK fertiliser and FYM is integral in not only optimising crop yields, but also driving key soil health-related parameters and economic benefits.</p>\n </section>\n </div>","PeriodicalId":100834,"journal":{"name":"Journal of Sustainable Agriculture and Environment","volume":"3 2","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2024-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/sae2.12100","citationCount":"0","resultStr":"{\"title\":\"Nitrogen and phosphorus mineralization and their corresponding monetary values under long-term integrated soil fertility management practices\",\"authors\":\"Peter Bolo, Monicah Mucheru-Muna, Michael Kinyua, George Ayaga, Sylvia Nyawira, Job Kihara\",\"doi\":\"10.1002/sae2.12100\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div>\\n \\n \\n <section>\\n \\n <h3> Introduction</h3>\\n \\n <p>Nitrogen (N) and phosphorus (P) are essential nutrients for plant growth, commonly supplied through costly inorganic amendments. However, despite the benefits of nutrient mineralisation, there is limited quantitative information on its monetary value, and the extent of associated potential financial relief to smallholder farmers, particularly in western Kenya region.</p>\\n </section>\\n \\n <section>\\n \\n <h3> Materials and Methods</h3>\\n \\n <p>This study used in situ resin core method to explore the extent of N and P nutrient mineralisation and monetary equivalents under select integrated soil fertility management (ISFM) practices in two long-term (17 years) trials namely Conservation Tillage (CT1) and Integrated Nutrient Management (INM3).</p>\\n </section>\\n \\n <section>\\n \\n <h3> Results</h3>\\n \\n <p>FYM addition increased various soil chemical parameters while sole fertiliser (NPK) reduced soil pH and soil organic carbon (SOC). Phosphorus application was associated with increased P availabillity and its monetary value within the first month (0.29 kg P ha<sup>−1</sup>; USD 1.13 ha<sup>−1</sup>) and second month (1.22 kg P ha<sup>−1</sup>; USD 4.76 ha<sup>−1</sup>) of incubation. The quantities of N mineralised, and their monetary equivalents varied with fertiliser application and incubation times. Nitrogen fertilisation depressed P mineralisation and monetary benefits. FYM application increased P mineralisation and its monetary value within 30 (0.78 kg ha<sup>−1</sup>; ~USD 3.02 ha<sup>−1</sup>) and 60 (1.22 kg ha<sup>−1</sup>; ~USD 4.76) days of incubation. Residue application increased mineralised N (17.48 kg ha<sup>−1</sup>; ~USD 22.79 ha<sup>−1</sup>) after 60 days. Maize and soybean intercropping increased N mineralisation (45.81 kg N ha<sup>−1</sup>) and monetary value (USD 59.76 ha<sup>−1</sup>). SOC and other soil variables, their stoichiometry ratios and N mineralisation were significantly correlated. Combined NPK and FYM application significantly (<i>p</i> ≤ 0.05) increased maize yields and grain prices.</p>\\n </section>\\n \\n <section>\\n \\n <h3> Conclusion</h3>\\n \\n <p>These findings reflect potential nutrient-based economic advantages of ISFM practices to resource-limited smallholder farmers. Combined application of NPK fertiliser and FYM is integral in not only optimising crop yields, but also driving key soil health-related parameters and economic benefits.</p>\\n </section>\\n </div>\",\"PeriodicalId\":100834,\"journal\":{\"name\":\"Journal of Sustainable Agriculture and Environment\",\"volume\":\"3 2\",\"pages\":\"\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2024-05-13\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://onlinelibrary.wiley.com/doi/epdf/10.1002/sae2.12100\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Sustainable Agriculture and Environment\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://onlinelibrary.wiley.com/doi/10.1002/sae2.12100\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Sustainable Agriculture and Environment","FirstCategoryId":"1085","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/sae2.12100","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Nitrogen and phosphorus mineralization and their corresponding monetary values under long-term integrated soil fertility management practices
Introduction
Nitrogen (N) and phosphorus (P) are essential nutrients for plant growth, commonly supplied through costly inorganic amendments. However, despite the benefits of nutrient mineralisation, there is limited quantitative information on its monetary value, and the extent of associated potential financial relief to smallholder farmers, particularly in western Kenya region.
Materials and Methods
This study used in situ resin core method to explore the extent of N and P nutrient mineralisation and monetary equivalents under select integrated soil fertility management (ISFM) practices in two long-term (17 years) trials namely Conservation Tillage (CT1) and Integrated Nutrient Management (INM3).
Results
FYM addition increased various soil chemical parameters while sole fertiliser (NPK) reduced soil pH and soil organic carbon (SOC). Phosphorus application was associated with increased P availabillity and its monetary value within the first month (0.29 kg P ha−1; USD 1.13 ha−1) and second month (1.22 kg P ha−1; USD 4.76 ha−1) of incubation. The quantities of N mineralised, and their monetary equivalents varied with fertiliser application and incubation times. Nitrogen fertilisation depressed P mineralisation and monetary benefits. FYM application increased P mineralisation and its monetary value within 30 (0.78 kg ha−1; ~USD 3.02 ha−1) and 60 (1.22 kg ha−1; ~USD 4.76) days of incubation. Residue application increased mineralised N (17.48 kg ha−1; ~USD 22.79 ha−1) after 60 days. Maize and soybean intercropping increased N mineralisation (45.81 kg N ha−1) and monetary value (USD 59.76 ha−1). SOC and other soil variables, their stoichiometry ratios and N mineralisation were significantly correlated. Combined NPK and FYM application significantly (p ≤ 0.05) increased maize yields and grain prices.
Conclusion
These findings reflect potential nutrient-based economic advantages of ISFM practices to resource-limited smallholder farmers. Combined application of NPK fertiliser and FYM is integral in not only optimising crop yields, but also driving key soil health-related parameters and economic benefits.
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