Effects of plant density and mepiquat chloride application on cotton boll setting in wheat–cotton double cropping system

LIU, Zhen-yu; Leila, I. M. TAMBEL; Zhang, Xiang; Yuan, Chen; CHEN, De-hua

doi:10.1016/s2095-3119(20)63286-5

Cited by 14 publications

(3 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…High PPD tends to concentrate boll setting on rst-position sympodial sites (Wilson et al, 2007). Combined high PPD and MC application produce more bolls residing on lower (Gwathmey and Clement, 2010) or low-middle sympodias (Mao et al, 2015), while Chen et al reported more bolls are positioned at the upper and middle canopy (Chen et al, 2021). More concentrated boll distribution due to the combination of high PPD and MC application implies a more synchronous demand for carbohydrates (Gwathmey and Clement, 2010).…”

Section: Introductionmentioning

confidence: 97%

See 1 more Smart Citation

Effects of Mepiquat Chloride and Plant Population Density on Leaf Photosynthesis and Carbohydrate Metabolism in Upland Cotton

Luo

Zhang

et al. 2023

Preprint

View full text Add to dashboard Cite

Background Mepiquat chloride (MC) application and increasing plant population density (PPD) are required for modern cotton production. However, their interactive effects on leaf physiology and carbohydrate metabolism remain obscure. This study aimed to determine how MC and PPD affect the leaf morpho-physiological charateristics, and thus final cotton yield. PPD of three levels (D1: 2.25 plants m-2, D2: 4.5 plants m-2, and D3: 6.75 plants m-2) and MC dosage of two levels (M0: 0 g ha-2, M1: 82.5 g ha-2) were combined to create six treatments. The dynamics of nonstructual carbohydrate concentration, carbon metabolism-related enzyme activity, and photosynthetic attributes in cotton leaves were examined during reproductive growth in 2019 and 2020. Results Among six treatments, the high PPD of 6.75 plants m-2 combined with MC application (MC1D3) exhibited the greatest seed cotton and biological yields. The sucrose, hexose, starch, and total nonstructural carbohydrate (TNC) concentrations peaked at first flowering (FF) stage and then declined down to a minimum at first boll opening (FBO) stage. Compared to the other treatments, MC1D3 improved starch, and TNC concentrations by 5.4–88.4%, 7.8–52.0% in 2019, and by 14.6–55.9%, 13.5–39.7% in 2020 at the FF stage, respectively; Additionally, The treatment produced higher transformation rates of starch and TNC during the FF to FBO stages, indicating greater carbon production and utilization efficiency with it. MC1D3 displayed the maximal SLW at the FBO stage, and the greatest Chl a, Chl b, and Chl a + b concentrations at the mid-late growth phase in both years. The Rubisco activity with MC1D3 was 2.6–53.2% higher at the flowering and boll setting stage in both years, and 2.4–52.7% higher at the FBO stage in 2020 than those in the other treatments. These results provided a explanation of higher leaf senescence-resistant ability in MC1D3. Conclusion Increasing PPD coupled with MC application improves cotton yield by enhancing leaf carbohydrate production and utilization efficiency and delaying leaf senescence.

show abstract

Section: Introductionmentioning

confidence: 97%

“…High PPD coupled with the optimal timing and dosage of MC improves cotton productivity (Ren et al, 2013;Gu et al, 2014;Chen et al, 2021). High PPD tends to concentrate boll setting on rst-position sympodial sites (Wilson et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Effects of Mepiquat Chloride and Plant Population Density on Leaf Photosynthesis and Carbohydrate Metabolism in Upland Cotton

Luo

Zhang

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…However, this technique has faced challenges recently due to the aging of rural labors and rapid urbanization causing increased labor costs [3][4][5]. In contrast, DSCWH presents a simplified, more efficient alternative to overcome the labor-intensive problem of transplanting [6][7][8]. Therefore, the DSCWH planting pattern has experienced significant growth in the cottongrowing regions in recent years [9,10].…”

Section: Introductionmentioning

confidence: 99%

Management Strategy of Slow-Release Nitrogen Fertilizers for Direct-Sown Cotton after Wheat Harvest

Lu,

Xu,

Liu

et al. 2024

Agronomy

Self Cite

View full text Add to dashboard Cite

The direct-sown cotton after wheat harvest (DSCWH) cropping system has attracted wide attention due to reduced labor inputs compared to transplanting. However, the management strategy of slow-release nitrogen is unclear in such a system. This study aims to investigate the impact of different timings and dosages of slow-release nitrogen fertilizer on the yield, biomass accumulation and distribution, and nitrogen absorption and nitrogen utilization in the DSCWH cropping system. This study was investigated at the experimental farm of Yangzhou University, China in 2020 and 2021, with the short-season cotton variety “Zhongmian 50” used as experimental material. Three dosages of the slow-release nitrogen fertilizer (45 kg·ha−1, 90 kg·ha−1, and 135 kg·ha−1) were applied at two stages of growth (two-leaf and four-leaf). The results showed that applying a 90 kg·ha−1 dosage at the two-leaf stage achieved the highest yield, which was increased by 12.6% compared to the no-fertilization control. Applying 90 kg·ha−1 of the slow-release nitrogen at the two-leaf stage promoted biomass accumulation, especially in reproductive organs, and this increase in biomass of reproductive organs was attributed to optimum nitrogen accumulation in reproductive organs (80~140 kg·ha−1). In addition, when 90 kg·ha−1 was applied at the two-leaf stage, there was a significant enhancement in nitrogen recovery efficiency (NRE), nitrogen agronomic use efficiency (NAE), and nitrogen physiological efficiency (NPE), with increases of 7.2% to 13.0%, 5.7% to 5.8%, and 5.6% to 6.5%, respectively. These results revealed that applying slow-release nitrogen fertilizer with the optimal dosage at the seedling stage could significantly enhance nitrogen use efficiency, nitrogen accumulation and partitioning, and biomass accumulation and distribution, which ultimately resulted in a higher lint yield in DSCWH. Therefore, to optimize yield and NUE, 90 kg·ha−1 slow-release nitrogen applied at the two-leaf stage would be recommended in the direct-sown cotton after wheat harvest cropping system.

show abstract

Cotton-Wheat System

Ahmed,

Ahmad,

Abbas

et al. 2024

Cropping Systems Modeling Under Changing Climate

View full text Add to dashboard Cite

Effects of plant density and mepiquat chloride application on cotton boll setting in wheat–cotton double cropping system

Cited by 14 publications

References 20 publications

Effects of Mepiquat Chloride and Plant Population Density on Leaf Photosynthesis and Carbohydrate Metabolism in Upland Cotton

Effects of Mepiquat Chloride and Plant Population Density on Leaf Photosynthesis and Carbohydrate Metabolism in Upland Cotton

Management Strategy of Slow-Release Nitrogen Fertilizers for Direct-Sown Cotton after Wheat Harvest

Cotton-Wheat System

Contact Info

Product

Resources

About