Competition for Light Interception in Cotton Populations of Different Densities

Chen, Huanxuan; Zhao, Xinxin; Han, Yingchun; Xing, Feifei; Feng, Lu; Wang, Zhanbiao; Wang, Guoping; Yang, Beifang; Lei, Yaping; Xiong, Shiwu; Li, Xiaofei; Xin, Minghua; An, Jie; Du, Weihua; Li, Yabing

doi:10.3390/agronomy11010176

Cited by 15 publications

(9 citation statements)

References 34 publications

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“…Heilman and Namken (1990) noted that the canopy closure of 76-cm rows was nearly 30 days earlier than the canopy closure of 102-cm row spacings. Chen et al (2021) observed that light interception was highest where plant populations were high. Riar et al (2009) noted that narrow 38-cm rows intercepted more light and reached canopy closure sooner than 97-cm rows.…”

Section: Resultsmentioning

confidence: 98%

Evaluating the impacts of wide row upland cotton (Gossypium hirsutum L.) production in Georgia

Lawton,

Pokhrel,

Lee

et al. 2023

Agronomy Journal

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Success stories of wide row cotton production have generated producer interest across the cotton belt. The objective of this study was to quantify the effect of row spacing on (1) cotton growth and development and (2) lint yield and fiber quality in Georgia. The cotton cultivar Deltapine DP 1646 (Bollgard 2 XtendFlex) (Bayer Crop Science, St. Luis, MO) was planted in 2021 and 2022 in Tifton, GA at row spacings of 91 cm, 122 cm, 152 cm, and 183 cm row spacings. Although canopy closure was delayed in wider row spacings compared to the 91 cm spacing, all other crop growth and development trends did not differ among row spacings. Similarly, row spacing had no effect on incidence of boll rot/ hard lock. The 91 cm row spacing yielded 1,734 kg lint ha−1. The 183 cm row spacing reduced yield 15% compared with the grower standard row spacing of 91 cm. Fiber quality parameters did not differ among row spacing treatments. Seed costs can be reduced in all wide row systems evaluated for cotton, and the 122 and 152 cm row spacings had similar yields to the 91 cm row spacing. However, Georgia growers produce peanuts (Arachis hypogea L.) and corn (Zea mays L.), the most common rotational crops for cotton producers, using a 91 cm row spacing. Consequently, the simplest transition to wide‐row production would be the 183 cm spacing, which incurred yield penalties in the current study. Thus, a 91 cm row spacing is still the most feasible option for Georgia cotton producers.This article is protected by copyright. All rights reserved

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Section: Resultsmentioning

confidence: 98%

Evaluating the impacts of wide row upland cotton (Gossypium hirsutum L.) production in Georgia

Lawton,

Pokhrel,

Lee

et al. 2023

Agronomy Journal

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“…The source of cotton growth is carbohydrates produced by photosynthesis, and different populations have different light distributions and solar radiation energy utilization [23,24]. There are differences in the characteristic values of dry matter accumulation among different planting densities [25].…”

Section: Discussionmentioning

confidence: 99%

“…The cumulative interception rate and transmittance in the whole canopy was calculated by Surfer software (Golden Software Inc., Golden, CO, USA) using the extended Simpson's 3/8 rule. The formula was as follows [24]:…”

Section: Light Interceptionmentioning

confidence: 99%

Effect of Spatial-Temporal Light Competition on Cotton Yield and Yield Distribution

et al. 2021

Self Cite

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The photosynthetically active radiation (PAR) of crop canopy is highly related to yield formation, but how it relates to yield and yield distribution is not well understood. The focus of this study was to explore the relationship between light competition under different densities and yield distributions of cotton. The experiment was conducted in 2019 and 2020 at the Cotton Research Institute of the Chinese Academy of Agricultural Sciences in Anyang city, Henan Province, China. A randomized block design was employed, with a total of three repeats. Each repeat had six density treatments: D1: 15,000; D2: 33,000; D3: 51,000; D4: 69,000; D5: 87,000; and D6: 105,000 plants·ha−1. As predicted, the results showed that the canopy light interception, leaf area index, plant height, and biomass of high-density cotton were higher than those of low-density cotton. The aboveground biomass produced by D6 was the highest, and was 12.9, 19.5, 25.4, 46.3, and 69.2% higher in 2019 and 14.3, 19.9, 32.5, 53.7, and 109.9% higher in 2020 than D5, D4, D3, D2, and D1, respectively. Leaf area, plant height, biomass, boll number, and boll weight were significantly correlated with the light interception rate. D5 (87,000 plants·ha−1) had a higher light interception rate and the highest yield. The highest lint yields produced by D5 were 1673.5 and 1375.4 kg·ha−1 in two years, and was 3.2, 4.3, 5.6, 9.7, and 24.7% higher in 2019, and 6.8, 10.6, 13.5, 21.5, and 34.4% higher in 2020 than D6, D4, D3, D2, and D1, respectively. The boll retention of the lower fruit branch under D5 reached 0.51 and 0.57 in two years, respectively. The shedding rate of the upper fruit branch decreased with the increase in cotton density in two years. The boll retention rate and shedding rate in the lower part of cotton plants were most closely related to light interception, with R2 values of 0.91 and 0.96, respectively. Our study shows cotton yield could be improved through higher light interception by optimizing planting density and canopy structure.

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“…As an important cash crop, cotton is highly valued by governments worldwide [1][2][3][4]. Xinjiang is the central cotton planting and production area in China.…”

Section: Introductionmentioning

confidence: 99%

Experimental Wear Behavior Analysis of Coated Spindle Hook Teeth under Real Harvesting Work Conditions

Zhang

et al. 2021

Materials

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This study aimed to investigate the wear failure changes of spindle hook teeth and the reasons for such failure during field work. Spindle samples were obtained from a fixed position of the spindle bar under different field picking area conditions and combined with the spatial distribution characteristics of cotton bolls in Xinjiang. After cutting a spindle sample, a scanning electron microscope and an energy spectrum analyzer were used to characterize the micromorphology and element composition of the hook tooth surface and cross section under different working area conditions. The wear parameters of the hook teeth were then extracted. The results showed that the thickness of the coating on the surface of the hook tooth used in this study was between 66.1 µm and 74.4 µm. The major chemical element was chromium, with a small amount of nickel. During the field picking process, failure of the coating on the surface of the hook teeth initially appeared on the tooth tip and tooth edge, and then spread to the entire hook tooth surface. The wear failure of the hook teeth resulted from abrasive wear, oxidative wear, and fatigue peeling. As the picking area increased, the wear area of the hook teeth increased exponentially, while the wear width increased linearly. When the field picking area reached 533.33 ha, the maximum change rate of the wear area was 2.33 × 103 µm2/ha, and the wear width was 1.84 µm/ha. During field work, the thickness of the coating decreased from the cutting surface to the tooth edge, and the wear rate gradually increased. The wear rate at Position 1 was the slowest, at 0.01 µm/ha, and the wear rate at Position 5 was the fastest, at 0.25 µm/ha.

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Competition for Light Interception in Cotton Populations of Different Densities

Cited by 15 publications

References 34 publications

Evaluating the impacts of wide row upland cotton (Gossypium hirsutum L.) production in Georgia

Evaluating the impacts of wide row upland cotton (Gossypium hirsutum L.) production in Georgia

Effect of Spatial-Temporal Light Competition on Cotton Yield and Yield Distribution

Experimental Wear Behavior Analysis of Coated Spindle Hook Teeth under Real Harvesting Work Conditions

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