Farm-Scale Estimation of Total Nitrogen Content in Surface Paddy Soils by Extraction with Commercially Available Hydrogen Peroxide
We recently proposed a simple method for estimating total nitrogen content in paddy soil. In this method, soil is extracted with a commercial 3% hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) solution at 25 °C for 40 h, and electrical conductivity (EC (H<sub>2&...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2019-12-01
|
| Series: | Agronomy |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4395/10/1/40 |
| _version_ | 1818426767015149568 |
|---|---|
| author | Naoki Moritsuka Hiroki Saito Ryosuke Tajima Yukitsugu Takahashi Hideaki Hirai |
| author_facet | Naoki Moritsuka Hiroki Saito Ryosuke Tajima Yukitsugu Takahashi Hideaki Hirai |
| author_sort | Naoki Moritsuka |
| collection | DOAJ |
| description | We recently proposed a simple method for estimating total nitrogen content in paddy soil. In this method, soil is extracted with a commercial 3% hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) solution at 25 °C for 40 h, and electrical conductivity (EC (H<sub>2</sub>O<sub>2</sub>)) of the extract is measured. This study aimed to further evaluate the method’s applicability to soil samples collected at the farm scale by using the original and six additional H<sub>2</sub>O<sub>2</sub> solutions that are locally and commercially available. The results obtained with the original solution indicated that the determination coefficients between EC (H<sub>2</sub>O<sub>2</sub>) and total N were statistically significant at all farms examined: Moka, 0.78 (<i>n</i> = 13); Kyoto, 0.50 (<i>n</i> = 16); Kizu, 0.43 (<i>n</i> = 89); and Kawatabi, 0.25 (<i>n</i> = 18). The EC of the tested H<sub>2</sub>O<sub>2</sub> solutions varied from less than 0.05 to 1.4 mS cm<sup>−1</sup> because of the addition of different stabilizers. EC (H<sub>2</sub>O<sub>2</sub>) values obtained with the less stabilized H<sub>2</sub>O<sub>2</sub> solutions (one from Japan, one from USA, and the analytical grade 6% solution) agreed well with those obtained with the original solution. Thus, the proposed method can be useful for estimating the farm-scale variation in soil total N, provided a H<sub>2</sub>O<sub>2</sub> solution with a low EC (<0.2 mS cm<sup>−1</sup>) is used for the extraction. |
| first_indexed | 2024-12-14T14:35:03Z |
| format | Article |
| id | doaj.art-84d54fb52e254720a2f6236b2289e126 |
| institution | Directory Open Access Journal |
| issn | 2073-4395 |
| language | English |
| last_indexed | 2024-12-14T14:35:03Z |
| publishDate | 2019-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Agronomy |
| spelling | doaj.art-84d54fb52e254720a2f6236b2289e1262022-12-21T22:57:40ZengMDPI AGAgronomy2073-43952019-12-011014010.3390/agronomy10010040agronomy10010040Farm-Scale Estimation of Total Nitrogen Content in Surface Paddy Soils by Extraction with Commercially Available Hydrogen PeroxideNaoki Moritsuka0Hiroki Saito1Ryosuke Tajima2Yukitsugu Takahashi3Hideaki Hirai4Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, JapanTropical Agriculture Research Front, Japan International Research Center for Agricultural Sciences, Okinawa 907-0002, JapanField Science Center, Tohoku University, Miyagi 989-6711, JapanUniversity Farm, Utsunomiya University, Tochigi 321-4415, JapanSchool of Agriculture, Utsunomiya University, Tochigi 321-8505, JapanWe recently proposed a simple method for estimating total nitrogen content in paddy soil. In this method, soil is extracted with a commercial 3% hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) solution at 25 °C for 40 h, and electrical conductivity (EC (H<sub>2</sub>O<sub>2</sub>)) of the extract is measured. This study aimed to further evaluate the method’s applicability to soil samples collected at the farm scale by using the original and six additional H<sub>2</sub>O<sub>2</sub> solutions that are locally and commercially available. The results obtained with the original solution indicated that the determination coefficients between EC (H<sub>2</sub>O<sub>2</sub>) and total N were statistically significant at all farms examined: Moka, 0.78 (<i>n</i> = 13); Kyoto, 0.50 (<i>n</i> = 16); Kizu, 0.43 (<i>n</i> = 89); and Kawatabi, 0.25 (<i>n</i> = 18). The EC of the tested H<sub>2</sub>O<sub>2</sub> solutions varied from less than 0.05 to 1.4 mS cm<sup>−1</sup> because of the addition of different stabilizers. EC (H<sub>2</sub>O<sub>2</sub>) values obtained with the less stabilized H<sub>2</sub>O<sub>2</sub> solutions (one from Japan, one from USA, and the analytical grade 6% solution) agreed well with those obtained with the original solution. Thus, the proposed method can be useful for estimating the farm-scale variation in soil total N, provided a H<sub>2</sub>O<sub>2</sub> solution with a low EC (<0.2 mS cm<sup>−1</sup>) is used for the extraction.https://www.mdpi.com/2073-4395/10/1/40electrical conductivityfarm-scale variationhydrogen peroxidenitrogenpaddy soilsimple method |
| spellingShingle | Naoki Moritsuka Hiroki Saito Ryosuke Tajima Yukitsugu Takahashi Hideaki Hirai Farm-Scale Estimation of Total Nitrogen Content in Surface Paddy Soils by Extraction with Commercially Available Hydrogen Peroxide Agronomy electrical conductivity farm-scale variation hydrogen peroxide nitrogen paddy soil simple method |
| title | Farm-Scale Estimation of Total Nitrogen Content in Surface Paddy Soils by Extraction with Commercially Available Hydrogen Peroxide |
| title_full | Farm-Scale Estimation of Total Nitrogen Content in Surface Paddy Soils by Extraction with Commercially Available Hydrogen Peroxide |
| title_fullStr | Farm-Scale Estimation of Total Nitrogen Content in Surface Paddy Soils by Extraction with Commercially Available Hydrogen Peroxide |
| title_full_unstemmed | Farm-Scale Estimation of Total Nitrogen Content in Surface Paddy Soils by Extraction with Commercially Available Hydrogen Peroxide |
| title_short | Farm-Scale Estimation of Total Nitrogen Content in Surface Paddy Soils by Extraction with Commercially Available Hydrogen Peroxide |
| title_sort | farm scale estimation of total nitrogen content in surface paddy soils by extraction with commercially available hydrogen peroxide |
| topic | electrical conductivity farm-scale variation hydrogen peroxide nitrogen paddy soil simple method |
| url | https://www.mdpi.com/2073-4395/10/1/40 |
| work_keys_str_mv | AT naokimoritsuka farmscaleestimationoftotalnitrogencontentinsurfacepaddysoilsbyextractionwithcommerciallyavailablehydrogenperoxide AT hirokisaito farmscaleestimationoftotalnitrogencontentinsurfacepaddysoilsbyextractionwithcommerciallyavailablehydrogenperoxide AT ryosuketajima farmscaleestimationoftotalnitrogencontentinsurfacepaddysoilsbyextractionwithcommerciallyavailablehydrogenperoxide AT yukitsugutakahashi farmscaleestimationoftotalnitrogencontentinsurfacepaddysoilsbyextractionwithcommerciallyavailablehydrogenperoxide AT hideakihirai farmscaleestimationoftotalnitrogencontentinsurfacepaddysoilsbyextractionwithcommerciallyavailablehydrogenperoxide |