{"title":"利用在线土壤硝酸盐数据优化施肥","authors":"Yonatan Yekutiel, Yuval Rotem, Shlomi Arnon, Ofer Dahan","doi":"10.5194/egusphere-2023-2775","DOIUrl":null,"url":null,"abstract":"<strong>Abstract.</strong> Managing fertilizer application according to actual soil nutrient availability is a key strategy for achieving sustainable agriculture and a healthy environment. A new soil nitrate monitoring system that was installed in cultivated field enabled, for the first time, controlling the nitrate concentration across the soil profile. The monitoring system was installed in a full-scale agricultural greenhouse setup that was used for growing a bell pepper crop. Continuous measurements of soil nitrate concentrations were performed across the soil profile of two plots: (a) an experimental plot, in which the fertigation regime was frequently adjusted, according to the dynamic variations in soil nitrate concentration and (b) a control plot, in which the fertigation was managed according to a predetermined fertigation schedule that is standard practice for the area. The results enabled an hourly resolution in tracking the dynamic soil nitrate concentration variations, in response to daily fertigation and crop demand. Nitrate concentrations, in and below the root zone, under the control plot, reached very high levels of ~800 ppm throughout the entire season. Obviously, this concentration reflects excessive fertigation, which is far beyond the plant demand, entailing severe groundwater pollution potential. On the other hand, frequent adjustments of the fertigation regime, which were carried out under the experimental plot, enabled control of the soil nitrate concentration around the desired concentration threshold. This enabled a dramatic reduction of 38 % in fertilizer application, while maintaining maximum crop yield and quality. Throughout this experiment, decision-making on the fertigation adjustments was done manually based on visual inspections of the soil’s reactions to changes in the fertigation regime. Nevertheless, it is obvious that an algorithm that continuously processes the soil nitrate concentration across the soil profile and provides direct fertigation commands could act as a \"fertistat\" that sets the soil nutrients at a desired optimal level. Consequently, it is concluded that fertigation that is based on continuous monitoring of the soil nitrate concentration may ensure nutrient application that accounts for plant demand, improves agricultural profitability, reduces nitrate down-leaching, and eliminates water resource pollution.","PeriodicalId":48610,"journal":{"name":"Soil","volume":null,"pages":null},"PeriodicalIF":5.8000,"publicationDate":"2023-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Optimized fertilization using online soil nitrate data\",\"authors\":\"Yonatan Yekutiel, Yuval Rotem, Shlomi Arnon, Ofer Dahan\",\"doi\":\"10.5194/egusphere-2023-2775\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<strong>Abstract.</strong> Managing fertilizer application according to actual soil nutrient availability is a key strategy for achieving sustainable agriculture and a healthy environment. A new soil nitrate monitoring system that was installed in cultivated field enabled, for the first time, controlling the nitrate concentration across the soil profile. The monitoring system was installed in a full-scale agricultural greenhouse setup that was used for growing a bell pepper crop. Continuous measurements of soil nitrate concentrations were performed across the soil profile of two plots: (a) an experimental plot, in which the fertigation regime was frequently adjusted, according to the dynamic variations in soil nitrate concentration and (b) a control plot, in which the fertigation was managed according to a predetermined fertigation schedule that is standard practice for the area. The results enabled an hourly resolution in tracking the dynamic soil nitrate concentration variations, in response to daily fertigation and crop demand. Nitrate concentrations, in and below the root zone, under the control plot, reached very high levels of ~800 ppm throughout the entire season. Obviously, this concentration reflects excessive fertigation, which is far beyond the plant demand, entailing severe groundwater pollution potential. On the other hand, frequent adjustments of the fertigation regime, which were carried out under the experimental plot, enabled control of the soil nitrate concentration around the desired concentration threshold. This enabled a dramatic reduction of 38 % in fertilizer application, while maintaining maximum crop yield and quality. Throughout this experiment, decision-making on the fertigation adjustments was done manually based on visual inspections of the soil’s reactions to changes in the fertigation regime. Nevertheless, it is obvious that an algorithm that continuously processes the soil nitrate concentration across the soil profile and provides direct fertigation commands could act as a \\\"fertistat\\\" that sets the soil nutrients at a desired optimal level. Consequently, it is concluded that fertigation that is based on continuous monitoring of the soil nitrate concentration may ensure nutrient application that accounts for plant demand, improves agricultural profitability, reduces nitrate down-leaching, and eliminates water resource pollution.\",\"PeriodicalId\":48610,\"journal\":{\"name\":\"Soil\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":5.8000,\"publicationDate\":\"2023-12-07\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Soil\",\"FirstCategoryId\":\"97\",\"ListUrlMain\":\"https://doi.org/10.5194/egusphere-2023-2775\",\"RegionNum\":2,\"RegionCategory\":\"农林科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"SOIL SCIENCE\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Soil","FirstCategoryId":"97","ListUrlMain":"https://doi.org/10.5194/egusphere-2023-2775","RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"SOIL SCIENCE","Score":null,"Total":0}
Optimized fertilization using online soil nitrate data
Abstract. Managing fertilizer application according to actual soil nutrient availability is a key strategy for achieving sustainable agriculture and a healthy environment. A new soil nitrate monitoring system that was installed in cultivated field enabled, for the first time, controlling the nitrate concentration across the soil profile. The monitoring system was installed in a full-scale agricultural greenhouse setup that was used for growing a bell pepper crop. Continuous measurements of soil nitrate concentrations were performed across the soil profile of two plots: (a) an experimental plot, in which the fertigation regime was frequently adjusted, according to the dynamic variations in soil nitrate concentration and (b) a control plot, in which the fertigation was managed according to a predetermined fertigation schedule that is standard practice for the area. The results enabled an hourly resolution in tracking the dynamic soil nitrate concentration variations, in response to daily fertigation and crop demand. Nitrate concentrations, in and below the root zone, under the control plot, reached very high levels of ~800 ppm throughout the entire season. Obviously, this concentration reflects excessive fertigation, which is far beyond the plant demand, entailing severe groundwater pollution potential. On the other hand, frequent adjustments of the fertigation regime, which were carried out under the experimental plot, enabled control of the soil nitrate concentration around the desired concentration threshold. This enabled a dramatic reduction of 38 % in fertilizer application, while maintaining maximum crop yield and quality. Throughout this experiment, decision-making on the fertigation adjustments was done manually based on visual inspections of the soil’s reactions to changes in the fertigation regime. Nevertheless, it is obvious that an algorithm that continuously processes the soil nitrate concentration across the soil profile and provides direct fertigation commands could act as a "fertistat" that sets the soil nutrients at a desired optimal level. Consequently, it is concluded that fertigation that is based on continuous monitoring of the soil nitrate concentration may ensure nutrient application that accounts for plant demand, improves agricultural profitability, reduces nitrate down-leaching, and eliminates water resource pollution.
SoilAgricultural and Biological Sciences-Soil Science
CiteScore
10.80
自引率
2.90%
发文量
44
审稿时长
30 weeks
期刊介绍:
SOIL is an international scientific journal dedicated to the publication and discussion of high-quality research in the field of soil system sciences.
SOIL is at the interface between the atmosphere, lithosphere, hydrosphere, and biosphere. SOIL publishes scientific research that contributes to understanding the soil system and its interaction with humans and the entire Earth system. The scope of the journal includes all topics that fall within the study of soil science as a discipline, with an emphasis on studies that integrate soil science with other sciences (hydrology, agronomy, socio-economics, health sciences, atmospheric sciences, etc.).