A new grading system for plant-available potassium using exhaustive cropping techniques combined with chemical analyses of soils

Li, Ting; Wang, Huoyan; Zhou, Zijun; Chen, Xiaoqin; Zhang, Jianmin

doi:10.1038/srep37327

Cited by 15 publications

(11 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The SKHC (mg kg –1 ) was calculated as the sum of plant‐available K in the initial soil (K initial ) extracted with NaTPB (Li et al., 2016) and the amount of exogenous K (K add ) required for the K sw to reach the critical K concentration K critical .…”

Section: Resultsmentioning

confidence: 99%

“…The soil organic matter was measured following the method of Yeomans and Bremner (1988). The plant‐available K was measured using the NaTPB method (Li et al., 2016). Briefly, a 0.5‐g air‐dried soil sample (<250 μm) was measured into a 50‐ml plastic centrifuge tube, and 3 ml of extractant (0.2 mol L –1 NaTPB +1 mol L –1 NaCl) were added to the tube, which was then covered with a lid and placed in a shaker at constant temperature and shaken at 200 rpm for 1 h. After shaking, 25 ml of the terminating agent (0.5 mol L –1 NH 4 Cl + 0.14 mol L –1 CuCl 2 ) were added to the tube, which was then heated in boiling water for 1 h. After cooling, 1 ml of 6 mol L –1 HCl was added to the tube and the mixture was filtered.…”

Section: Methodsmentioning

confidence: 99%

“…However, several studies have demonstrated that the HNO 3 method destroys soil clay minerals (Alkanani et al., 1984; Chardon et al., 2006) and extracts some soil K that cannot be used by plants, on the other side, this method cannot extract all the non‐exchangeable K, thereby consistently underestimating soil K fertility (Li, 2015; Wang et al., 2016). The sodium tetraphenylborate (NaTPB) extraction method has, therefore, become widely used to determine the available K in soil because it extracts all readily available K and a large part of non‐exchangeable K. Its slow process and ability to release poorly available K allows NaTPB to extract soil K in a manner similar to that of plant roots (Darunsontaya et al., 2010; Li et al., 2016), making this method more appropriate for soil K fertility evaluation.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Evaluation of soil potassium‐holding capacity based on waterlogging‐simulation experiments

Zhao

Gao

et al. 2021

Agronomy Journal

Self Cite

View full text Add to dashboard Cite

Evaluating the capacity and loss risk of soil nutrients is helpful to make fertilization strategies. Herein, the term of soil potassium (K)-holding capacity (SKHC) was put forward to assess the capacity and loss risk of plant-available K of specific soils. In this study, SKHC was evaluated via soil waterlogging-simulation experiments using 14 different soils. The K concentrations in surface water were measured, and a critical K concentration was selected to indicate high soil K loss. Results showed that the surface water K concentration (K sw ) was significantly affected by waterlogging time, temperature, and soil thickness. The average K sw of 5-cm soil columns waterlogged for 24 h for the 14 soils was 5 mg L -1 (1.57-8.57 mg L -1 ); this was subsequently used as the critical K concentration. By repeating the waterlogging simulation experiment with soils treated with different rates of K fertilizer, a quadratic relationship between the K rate and K sw was found and used to determine the K rate required making the K sw reach the critical K concentration. For the 14 soils, SKHC ranged from 133 to 2,054 mg kg -1 and can be classified into four levels: low, <500 mg kg -1 ; moderate, 500-1,000 mg kg -1 ; high, 1,000-1,500 mg kg --1 ; and extremely high, >1,500 mg kg -1 . These results allowed the preliminary establishment of an SKHC evaluation method and grading system. Future studies should verify the SKHC under field conditions and optimize the assessment method proposed in this study. INTRODUCTIONPotassium (K) is the most abundant cation within plants. Although K is not required for tissue formation (Pettigrew, Abbreviations: K critical , critical potassium concentration; K initial , plant-available potassium of initial soil; K sw , potassium concentrations in surface water; K sw-5-24 , potassium concentration in surface water at the waterlogging time of 24 h; NaTPB, sodium tetraphenylborate; NH 4 OAc, ammonium acetate; SKHC, soil potassium-holding capacity.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Evaluation of soil potassium‐holding capacity based on waterlogging‐simulation experiments

Zhao

Gao

et al. 2021

Agronomy Journal

Self Cite

View full text Add to dashboard Cite

show abstract

“…These distortions may have significant environmental impacts, notably on water quality, soil erosion and greenhouse gas emissions. Li et al [76] found that soil information could be incorporated into crop rating. First, it provides a method to downscale the premium rating to the field level (or microlevel).That is, each individual piece of land can be precisely rated according to its risk characteristics.…”

Section: Discussionmentioning

confidence: 99%

Crop Insurance, Land Productivity and the Environment: A Way forward to a Better Understanding

et al. 2021

View full text Add to dashboard Cite

Providing farmers with effective risk management tools and increasing the productivity of factors of production, while limiting negative effects on the environment, is an important challenge for the current EU agricultural policy. The aim of this research is to identify and evaluate the relationship between crop insurance and land productivity in the context of environmental effects. The study covered farms with crop insurance participating in the Polish FADN system. The article uses the TOPSIS method of organizing objects. We classify farms in terms of land productivity and examine the relationship between these results and the value of insurance coverage. In our conceptual and empirical framework, we recognize that there is a mutual relationship between crop insurance, land productivity and the environment. Our empirical results show that the level of insurance coverage may support the increase in land productivity, indirectly affecting the environment. Farms with the highest productivity level were characterized by an average value of insurance that was double that compared to farms with the lowest productivity level.

show abstract

“…NaTPB-K was a good methods for grading NEK bioavailability. Plant-available K in soils was classified into three categories: high available K, medium available K and low available K, and grading criteria and measurement methods were also proposed 23 . Better relationship of relative yield and NaTPB-K compared with other methods (Fig.…”

Section: Discussionmentioning

confidence: 99%

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

Zhang

Wang

et al. 2018

Sci Rep

View full text Add to dashboard Cite

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.

show abstract

A new grading system for plant-available potassium using exhaustive cropping techniques combined with chemical analyses of soils

Cited by 15 publications

References 39 publications

Evaluation of soil potassium‐holding capacity based on waterlogging‐simulation experiments

Evaluation of soil potassium‐holding capacity based on waterlogging‐simulation experiments

Crop Insurance, Land Productivity and the Environment: A Way forward to a Better Understanding

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

Contact Info

Product

Resources

About