Establishing grading indices of available soil potassium on paddy soils in Hubei province, China

Abstract Soil testing is an important diagnostic tool for assessing crop-available soil potassium (K) and hence making appropriate fertilizer recommendation. This study was aimed at correlating grain yield response data to soil-test K extracted with ammonium acetate (NH4OAc), cold nitric acid (HNO3)...

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Autores principales:	Xiaokun Li, Yangyang Zhang, Weini Wang, Muhammad Rizwan Khan, Rihuan Cong, Jianwei Lu
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Paddy Soil Cold HNO Deficiency Indices Significant Logarithmic Relationship Fertilizer Recommendations Medicine R Science Q
Acceso en línea:	https://doaj.org/article/6a80e610facd4afbbb3e33da989a9f17
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spelling	oai:doaj.org-article:6a80e610facd4afbbb3e33da989a9f172021-12-02T15:08:40ZEstablishing grading indices of available soil potassium on paddy soils in Hubei province, China10.1038/s41598-018-33802-32045-2322https://doaj.org/article/6a80e610facd4afbbb3e33da989a9f172018-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-33802-3https://doaj.org/toc/2045-2322Abstract Soil testing is an important diagnostic tool for assessing crop-available soil potassium (K) and hence making appropriate fertilizer recommendation. This study was aimed at correlating grain yield response data to soil-test K extracted with ammonium acetate (NH4OAc), cold nitric acid (HNO3), sodium tetraphenylboron (NaTPB) and boiling HNO3 solution, based on 54 field trials conducted during 2011 to 2015 across 15 counties in Hubei province, China. The specific objectives were to establish abundance and deficiency indices of available soil-K (ASK) for rice (Oryza sativa L.) and make accurate K fertilizer recommendations. Potassium extracted with NaTPB and boiling HNO3 was 1.47 times and 3.61 times higher respectively than that extracted with cold HNO3, while K extracted with cold HNO3 was 1.32 times higher than that extracted with NH4OAc. There were significant logarithmic relationships between crop response and soil-test K. The R2 values for cold HNO3-K and NaTPB-K methods were much higher than for NH4OAc-K method. In order to calibrate the application, the abundance and deficiency indices of ASK categorized by cold HNO3-K in low, medium, high and very high ranges were <50 mg kg−1, 50 to 100 mg kg−1, 100 to 200 mg kg−1 and >200 mg kg−1 respectively, and that defined by NaTPB-K were <60 mg kg−1, 60 to 150 mg kg−1, 150 to 330 mg kg−1 and >330 mg kg−1, respectively. These values could be used to evaluate soil K supplying capacity and make appropriate K fertilizer recommendations for rice.Xiaokun LiYangyang ZhangWeini WangMuhammad Rizwan KhanRihuan CongJianwei LuNature PortfolioarticlePaddy SoilCold HNODeficiency IndicesSignificant Logarithmic RelationshipFertilizer RecommendationsMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-8 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Paddy Soil Cold HNO Deficiency Indices Significant Logarithmic Relationship Fertilizer Recommendations Medicine R Science Q
spellingShingle	Paddy Soil Cold HNO Deficiency Indices Significant Logarithmic Relationship Fertilizer Recommendations Medicine R Science Q Xiaokun Li Yangyang Zhang Weini Wang Muhammad Rizwan Khan Rihuan Cong Jianwei Lu Establishing grading indices of available soil potassium on paddy soils in Hubei province, China
description	Abstract Soil testing is an important diagnostic tool for assessing crop-available soil potassium (K) and hence making appropriate fertilizer recommendation. This study was aimed at correlating grain yield response data to soil-test K extracted with ammonium acetate (NH4OAc), cold nitric acid (HNO3), sodium tetraphenylboron (NaTPB) and boiling HNO3 solution, based on 54 field trials conducted during 2011 to 2015 across 15 counties in Hubei province, China. The specific objectives were to establish abundance and deficiency indices of available soil-K (ASK) for rice (Oryza sativa L.) and make accurate K fertilizer recommendations. Potassium extracted with NaTPB and boiling HNO3 was 1.47 times and 3.61 times higher respectively than that extracted with cold HNO3, while K extracted with cold HNO3 was 1.32 times higher than that extracted with NH4OAc. There were significant logarithmic relationships between crop response and soil-test K. The R2 values for cold HNO3-K and NaTPB-K methods were much higher than for NH4OAc-K method. In order to calibrate the application, the abundance and deficiency indices of ASK categorized by cold HNO3-K in low, medium, high and very high ranges were <50 mg kg−1, 50 to 100 mg kg−1, 100 to 200 mg kg−1 and >200 mg kg−1 respectively, and that defined by NaTPB-K were <60 mg kg−1, 60 to 150 mg kg−1, 150 to 330 mg kg−1 and >330 mg kg−1, respectively. These values could be used to evaluate soil K supplying capacity and make appropriate K fertilizer recommendations for rice.
format	article
author	Xiaokun Li Yangyang Zhang Weini Wang Muhammad Rizwan Khan Rihuan Cong Jianwei Lu
author_facet	Xiaokun Li Yangyang Zhang Weini Wang Muhammad Rizwan Khan Rihuan Cong Jianwei Lu
author_sort	Xiaokun Li
title	Establishing grading indices of available soil potassium on paddy soils in Hubei province, China
title_short	Establishing grading indices of available soil potassium on paddy soils in Hubei province, China
title_full	Establishing grading indices of available soil potassium on paddy soils in Hubei province, China
title_fullStr	Establishing grading indices of available soil potassium on paddy soils in Hubei province, China
title_full_unstemmed	Establishing grading indices of available soil potassium on paddy soils in Hubei province, China
title_sort	establishing grading indices of available soil potassium on paddy soils in hubei province, china
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/6a80e610facd4afbbb3e33da989a9f17
work_keys_str_mv	AT xiaokunli establishinggradingindicesofavailablesoilpotassiumonpaddysoilsinhubeiprovincechina AT yangyangzhang establishinggradingindicesofavailablesoilpotassiumonpaddysoilsinhubeiprovincechina AT weiniwang establishinggradingindicesofavailablesoilpotassiumonpaddysoilsinhubeiprovincechina AT muhammadrizwankhan establishinggradingindicesofavailablesoilpotassiumonpaddysoilsinhubeiprovincechina AT rihuancong establishinggradingindicesofavailablesoilpotassiumonpaddysoilsinhubeiprovincechina AT jianweilu establishinggradingindicesofavailablesoilpotassiumonpaddysoilsinhubeiprovincechina
_version_	1718388063823986688

Establishing grading indices of available soil potassium on paddy soils in Hubei province, China

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