Lowering Nitrogen and Increasing Potassium Application Level Can Improve the Yield and Quality of Panax notoginseng

Ou, Xiaohong; Cui, Xiuming; Zhu, Duanwei; Guo, Lan-Ping; Liu, Dahui; Yang, Ye

doi:10.3389/fpls.2020.595095

Cited by 21 publications

(8 citation statements)

References 45 publications

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“…Shading experiments showed that the reduction in radiation and thermal energy during the grain filling stage directly damaged the leaf photosynthetic system, decreased the yields of ATP, delayed plant flowering, and hampered pollen germination and pollen tube growth, thereby causing an abortion in embryos and a grain weight decrease [19,[30][31][32][33]. Some studies have shown that cold stress during the reproductive stage causes the degeneration of spikelets and an increase in spikelet sterility, affecting seed filling, which leads to a low seed set and low grain weight [18,21]. Indeed, in our study, the response of rice grain weight reduction to Low-DTL was higher than other yield components, implying that insufficient grain filling was a major contributor to rice yield losses under poor weather after heading [32,33].…”

Section: Effect Of Daytime Temperature and Light Change After Heading...mentioning

confidence: 99%

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The Yield-Forming Role of Nitrogen in Rice in the Growing Seasons with Variable Thermal Conditions

Zhang

Zhou

et al. 2023

Agronomy

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A reduced basal and increased topdressing fertilizer rate (RBIT) can usually increase rice yield, but whether this practice alleviates the impact of poor weather on rice production is unknown. Thus, the effect of three integrated RBIT treatments (RBITs, including RBIT alone, RBIT in combination with straw incorporation (RBITS) or a reduced fertilizer rate (RBITR)) on rice growth and nutritional status under different weathers was investigated in a 9-year experiment. Conventional fertilization (CF) was the control. We found that daytime temperature and light (DTL) after heading were the main meteorological factors limiting rice yield increases. RBITs did not affect rice yield under High-DTL, compared with CF, but RBITS significantly increased rice yield under Low-DTL. Compared with High-DTL, the positive effect of RBIT and RBITR on the N concentration and proportion in vegetative organs under Low-DTL was higher than the K concentration in vegetative organs, but RBITS showed the opposite trend. Regression analysis indicated that the harvest index had stronger correlations with the N concentration (negative), K concentration (positive), and N/K (negative) in vegetative organs under Low-DTL than under High-DTL. Our findings suggested that RBITS could improve rice adaptability to daytime temperature and light changes after heading by balancing crop nutritional status (N/K).

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Section: Effect Of Daytime Temperature and Light Change After Heading...mentioning

confidence: 99%

“…Plant nutritional status plays a crucial role in crop tolerance or resistance to abiotic stresses [19][20][21]. Generally, the risk of cold damage was increased with high crop-N status [22].…”

Section: Introductionmentioning

confidence: 99%

The Yield-Forming Role of Nitrogen in Rice in the Growing Seasons with Variable Thermal Conditions

Zhang

Zhou

et al. 2023

Agronomy

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“…For enhancing crop yields, fertilizer is the second most important factor [17]. In order to make up for the lack of nutrients in red soil and obtain a higher yield, P. notoginseng was treated with a large number of chemical fertilizers during the planting process [11,18,19]. This resulted in soil acidification, nutrient loss, and nitrate pollution, and the remaining chemical fertilizer would also be discharged into the soil and surrounding waters in large amounts, causing great damage to the ecology [11,20].…”

Section: Introductionmentioning

confidence: 99%

Coupling Effect of Water and Soluble Organic Fertilizer on Yield and Quality of Panax notoginseng under Micro-Sprinkler Irrigation in Southwest China

Zang

Wang

et al. 2023

Agronomy

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The cultivation of Panax notoginseng has been plagued by a multitude of challenges, including recurrent diseases, suboptimal value, inadequate quality, and environmental degradation resulting from improper water and fertilizer management. To address these issues and improve the yield of P. notoginseng and its saponin content, this study endeavors to identify the optimal irrigation and fertilization levels in shaded environments in Yunnan Province in Southwest China. In this field experiment, three-year-old plants were tested to evaluate the effects of water, soluble organic fertilizers, and their combinations on plant growth, physiological parameters, yield, and saponin content. The experiment included 12 treatments with three types of irrigation (10 (W1), 15 (W2), and 20 (W3) mm), totaling 440, 660, and 880 mm, and four levels of the total amount of fertilization (F1 (60, total N 12.6, total P 5.5, and total K 10.5 kg ha−1), F2 (90, total N 18.9, total P 8.3, and total K 15.7 kg ha−1), F3 (120, total N 25.2, total P 11.0, and total K 20.9 kg ha−1), F4 (150, total N 31.5, total P 13.8, and total K 26.1 kg ha−1)). The randomized complete block design was used, with 36 plots in total and 3 replications. The study utilized the TOPSIS method to determine the most effective water and fertilizer management strategy for the growth and production of P. notoginseng. The assessment of yield, water and fertilizer productivity, and saponin content across all treatments revealed that the W3F3 treatment resulted in significant increases in the plant’s height, stem diameter, and net photosynthetic rate. Meanwhile, the W2F3 treatment exhibited the best root morphological traits. The W3F4 treatment effectively increased dry matter and transpiration. The combination of water and fertilization had a coupling effect that not only increased yield to 1400 kg ha−1 but also improved water–fertilizer productivity. The application of the W2F3 treatment resulted in a significant increase in the accumulation of active components, leading to a total P. notoginseng saponin (PNS) content of 24.94%. Moreover, the comprehensive index obtained through the TOPSIS model indicated that the W2F3 treatment outperformed other treatments. Therefore, this treatment can be considered a promising water and fertilizer model for P. notoginseng cultivation, which can enhance its yield, quality, and productivity while promoting sustainable green development.

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“…Panax notoginseng (Burkill) F. H. Chen (Sanqi in Chinese) is a typically shade-tolerant and N-sensitive species from the family of Araliaceae ( Yang et al, 2008 ; Chen J.W. et al, 2016 ; Ou et al, 2020 ; Zhang Q.H. et al, 2020 ; Zhang J.Y.…”

Section: Introductionmentioning

confidence: 99%

“…et al, 2021 ). Excessive application of N fertilizer is a problem in P. notoginseng production ( Ou et al, 2020 ). N application rate in conventional cultivation of P. notoginseng is 450 kg ha –1 ( Xia et al, 2016 ), which not only exceeded its demand ( Ou et al, 2011 ) but also increased root decay and mortality rate; thus, P. notoginseng has been commonly believed to be the N-sensitive species ( Zheng et al, 2017 ; Wei et al, 2018 ; Zhang J.Y.…”

Section: Introductionmentioning

confidence: 99%

Responses of Linear and Cyclic Electron Flow to Nitrogen Stress in an N-Sensitive Species Panax notoginseng

Zhang

Shuang

et al. 2022

Front. Plant Sci.

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Nitrogen (N) is a primary factor limiting leaf photosynthesis. However, the mechanism of N-stress-driven photoinhibition of the photosystem I (PSI) and photosystem II (PSII) is still unclear in the N-sensitive species such as Panax notoginseng, and thus the role of electron transport in PSII and PSI photoinhibition needs to be further understood. We comparatively analyzed photosystem activity, photosynthetic rate, excitation energy distribution, electron transport, OJIP kinetic curve, P700 dark reduction, and antioxidant enzyme activities in low N (LN), moderate N (MN), and high N (HN) leaves treated with linear electron flow (LEF) inhibitor [3-(3,4-dichlorophenyl)-1,1-dimethyl urea (DCMU)] and cyclic electron flow (CEF) inhibitor (methyl viologen, MV). The results showed that the increased application of N fertilizer significantly enhance leaf N contents and specific leaf N (SLN). Net photosynthetic rate (Pn) was lower in HN and LN plants than in MN ones. Maximum photochemistry efficiency of PSII (Fv/Fm), maximum photo-oxidation P700+ (Pm), electron transport rate of PSI (ETRI), electron transport rate of PSII (ETRII), and plastoquinone (PQ) pool size were lower in the LN plants. More importantly, K phase and CEF were higher in the LN plants. Additionally, there was not a significant difference in the activity of antioxidant enzyme between the MV- and H2O-treated plants. The results obtained suggest that the lower LEF leads to the hindrance of the formation of ΔpH and ATP in LN plants, thereby damaging the donor side of the PSII oxygen-evolving complex (OEC). The over-reduction of PSI acceptor side is the main cause of PSI photoinhibition under LN condition. Higher CEF and antioxidant enzyme activity not only protected PSI from photodamage but also slowed down the damage rate of PSII in P. notoginseng grown under LN.

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Lowering Nitrogen and Increasing Potassium Application Level Can Improve the Yield and Quality of Panax notoginseng

Cited by 21 publications

References 45 publications

The Yield-Forming Role of Nitrogen in Rice in the Growing Seasons with Variable Thermal Conditions

The Yield-Forming Role of Nitrogen in Rice in the Growing Seasons with Variable Thermal Conditions

Coupling Effect of Water and Soluble Organic Fertilizer on Yield and Quality of Panax notoginseng under Micro-Sprinkler Irrigation in Southwest China

Responses of Linear and Cyclic Electron Flow to Nitrogen Stress in an N-Sensitive Species Panax notoginseng

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