Potassium Internal Use Efficiency Relative to Growth Vigor, Potassium Distribution, and Carbohydrate Allocation in Rice Genotypes

Yang, Xiaoe; Liu, Jian‐Xiang; Wang, W. M.; Ye, Z. Q.; Luo, Ancheng

doi:10.1081/pln-120030674

Cited by 91 publications

(61 citation statements)

References 12 publications

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“…The IE K in this study is comparable with the result of Islam and Muttaleb, who obtained IE K values of 41.82-86.36 kg kg −1 with various K application rates during various years in a wetland rice ecosystem under a subtropical climate [55]. It has been reported that IE K was associated with K absorption, translocation and distribution in plant tissues at the cellular level [56]. In the present study, we found that a higher K uptake into rice was not accompanied by an increased rice yield when biochar was applied.…”

Section: Nutrient Uptakesupporting

confidence: 79%

The Short-Term Effects of Rice Straw Biochar, Nitrogen and Phosphorus Fertilizer on Rice Yield and Soil Properties in a Cold Waterlogged Paddy Field

Xie

et al. 2018

Sustainability

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Abstract:Crop productivity in cold waterlogged paddy fields can be constrained by chronic flooding stress and low temperature. Farmers typically use chemical fertilizer to improve crop production, but this conventional fertilization is not very effective in a cold waterlogged paddy field. Biochar amendment has been proposed as a promising management approach to eliminating these obstacles. However, little is known about the performance of biochar when combined with N fertilizer and P fertilizer in cold waterlogged soils. The aim of this study was, therefore, to assess the main effects and interactive effects of rice straw biochar, N and P fertilizer on rice growth and soil properties in a cold waterlogged paddy field. The field treatments consisted of a factorial combination of two biochar levels (0 and 2.25 t ha −1 ), two N fertilizer levels (120.0 and 180.0 kg ha −1 ) and two P fertilizer levels (37.5 and 67.5 kg ha −1 ) which were arranged in a randomized block design, with three replicates. Results confirmed that biochar application caused a significant increase in the soil pH due to its liming effect, while this application resulted in a significant decrease in soil exchangeable cations, such as exchangeable Ca, Mg, Al and base cations. The interactive effect of N fertilizer, P fertilizer and biochar was significant for soil total N. Moreover, a negative effect of biochar on the internal K use efficiency suggested that K uptake into rice may benefit from biochar application. According to the partial Eta squared values, the combined application of N fertilizer and biochar was as effective as pure P fertilization at increasing straw P uptake. The addition of biochar to farmers' fertilization practice treatment (180.0 kg N ha −1 , 67.5 kg P 2 O 5 ha −1 and 67.5 kg K 2 O ha −1 ) significantly increased rice yield, mainly owing to improvements in grains per panicle. However, notable effects of biochar on rice yield and biomass production were not detected. More studies are required to assess the long-term behavior of biochar in a cold waterlogged paddy field. This study may lay a theoretical foundation for blended application of biochar with fertilizer in a cold waterlogged paddy field.

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Section: Nutrient Uptakesupporting

confidence: 79%

The Short-Term Effects of Rice Straw Biochar, Nitrogen and Phosphorus Fertilizer on Rice Yield and Soil Properties in a Cold Waterlogged Paddy Field

Xie

et al. 2018

Sustainability

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“…Genotypic differences in K use efficiency have been reported in various crops, e.g., alfalfa (James et al, 1995), snapbean (Shea et al, 1968), soybean (Sale and Campbell, 1987), tomato (Chen and Gabelman, 1995), ramie (Liu et al, 2000), corn (Baligar and Barber, 1979), wheat (Zhang et al, 1999) and barley (Pettersson and Jensén, 1983). Genetic variation also exists in rice in low K soils (Liu et al, 1987;Yang et al, 2003;2004b). Nonetheless, investigations on mechanisms of K efficiency of lowland rice are scanty.…”

Section: Introductionmentioning

confidence: 99%

Differential response of root morphology to potassium deficient stress among rice genotypes varying in potassium efficiency

Jia¹,

Yang²,

Feng

et al. 2008

J. Zhejiang Univ. Sci. B

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Disparity in the root morphology of six rice (Oryza sativa L.) genotypes varying in potassium (K) efficiency was studied with three K levels: 5 mg/L (low), 10 mg/L (moderate) and 40 mg/L (adequate) in hydroponic culture. Morphological parameters included root length, surface area, volume and count of lateral roots, as well as fine (diameter<0.2 mm) and thick (diameter>0.2 mm) roots. The results indicate that the root growth of all genotypes was reduced under low K, but moderate K deficiency increased the root length of the efficient genotypes. At deficient and moderate K levels, all the efficient rice genotypes developed more fine roots (diameter<0.2 mm) than the inefficient ones. Both fine root count and root surface area were found to be the best parameters to portray K stress in rice. In accordance with the root morphology, higher K concentrations were noted in shoots of the efficient genotypes when grown at moderate and deficient K levels, indicating that root morphology parameters are involved in root uptake for K and in the translocation of K up to shoots. K deficiency affected not only the root morphology, but also the root ultra-structure. The roots of high-efficient genotypes had stronger tolerance to K deficient stress for root membrane damage, and could maintain the developed root architecture to adapt to the low K growth medium.

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“…This clearly indicates that for linseed seedlings under water stress conditions, K + is the main inorganic osmolyte used to maintain essential enzymatic processes in the cytoplasm. Under drought conditions, the K + could increase plant water keeping ability, protect the cell membrane hydration layer and keep the cell membrane stability by enhance carbon and nitrogen metabolism, and active oxygen metabolism (Egilla et al, 2001;Yamada et al, 2002;Yang et al, 2004;Jose et al, 2005). In this research, we propose that increased Na + decreased caused by water stress compare as control one.…”

Section: Effect Of Water Stress Treatments On Ionic Balancementioning

confidence: 99%

Effects of Water Stress on Germination and Growth of Linseed Seedlings (Linum usitatissimum L), Photosynthetic Efficiency and Accumulation of Metabolites

Guo¹,

Hao²,

Gong³

2012

JAS

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Drought is a serious problem in many nations, adversely affecting both crop growth and yield. Here, we investigate the effects of water stress on growth, photosynthesis, physiology and germination in seedlings of linseed (Linum usitatissimum L). Water stress was imposed by exposing the sand-grown roots to irrigation with a range of concentrations of polyethylene glycol-6000 (PEG). Both relative growth rate (RGR) and water content (WC) decreased with increasing PEG concentration with the reductions being greatest for 20% PEG (water potential -0.58 MPa). The results show that as PEG concentration increased, the fluorescent chlorophyll and chloroplast pigments decreased but the ratio of Chl a/Chl b gradually increased. Meanwhile, shoot carbohydrate content increased slightly with increasing PEG concentration while that in the roots peaked at 5% PEG (-0.09 MPa) before decreasing at higher PEG concentrations. The content of proline in shoots and roots increased with increasing PEG concentration. With increasing PEG concentration, betaine showed a slight tendency to rise in the root, but to rise and then fall in the shoot. The results indicate that PEG-induced water stress increased the accumulations of carbohydrate, proline and betaine. These may help the linseed seedlings to survive periods of osmotic stress induced by drought and may be involved in the perception and transmission a drought signal, also playing a role in osmotic adjustment. Under water stress, the main inorganic ions involved in osmotic adjustment were K + , Na + , Ca 2+ and Cl -likely thereby increasing drought resistance. The germination percentage of the seeds was severely reduced by increasing PEG concentrations, ceasing altogether at 15% PEG. Many of the seeds that remained dormant in the higher PEG concentrations germinated satisfactorily when afterwards placed in pure water. The research provides useful leads in the planned development of linseed cultivars having increased drought tolerance.

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Potassium Internal Use Efficiency Relative to Growth Vigor, Potassium Distribution, and Carbohydrate Allocation in Rice Genotypes

Cited by 91 publications

References 12 publications

The Short-Term Effects of Rice Straw Biochar, Nitrogen and Phosphorus Fertilizer on Rice Yield and Soil Properties in a Cold Waterlogged Paddy Field

The Short-Term Effects of Rice Straw Biochar, Nitrogen and Phosphorus Fertilizer on Rice Yield and Soil Properties in a Cold Waterlogged Paddy Field

Differential response of root morphology to potassium deficient stress among rice genotypes varying in potassium efficiency

Effects of Water Stress on Germination and Growth of Linseed Seedlings (Linum usitatissimum L), Photosynthetic Efficiency and Accumulation of Metabolites

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