Determination of a plant population density threshold for optimizing cotton lint yield: A synthesis

Adams, Curtis B.; Thapa, Santanu; Kimura, Emi

doi:10.1016/j.fcr.2018.10.005

Cited by 41 publications

(29 citation statements)

References 18 publications

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“…There were no yield differences among cotton cropping systems and there were few significant or consistent trends among systems in crop development, maturity, reproductive characteristics, biomass partitioning, and total biomass productivity (Tables 1 and 2). Trends in these growth and developmental parameters have been predictive of yield outcomes and shown various types of divergence in cotton cropping systems in other studies, even when yields ultimately did not differ (Adams, Thapa, & Kimura, 2019; Boquet et al., 2004a; Byrd et al., 2019; Schomberg & Endale, 2004; Schomberg et al., 2006). The results of this study are discussed in the following paragraphs in relation to the most common concerns of cotton producers, in the Texas Rolling Plains and elsewhere, about conservation management: effects on soil moisture dynamics, early season soil temperature, and soil fertility.…”

Section: Discussionmentioning

confidence: 88%

Growth and development of irrigated cotton in conservation management systems of the Texas Rolling Plains

Adams¹,

Thapa²,

DeLaune³

2020

Agronomy Journal

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Conservation tillage and cover cropping are expected to enhance multiple ecosystem services in cotton (Gossypium hirsutum L.) production systems. The few published studies addressing this in the transitional climate of the Texas Rolling Plains region have shown cotton lint yield to be the same in conservation and conventional management systems, though the specific effects of conservation management are still being debated and producer adoption remains low. In this study, in which data was collected in Years 5 and 6 in long-term management plots, our objective was to make detailed, season-long measurements of crop development and productivity parameters, identifying diversions among systems, if any. The irrigated cotton management systems included: conventional tillage (CT), no-till (NT), no-till with wheat (Triticum aestivum) cover crop (NT-WC), and no-till with mixed-species cover crop (NT-MC). Several differences were found among systems over discrete timeframes, though these were mostly transient changes without year-to-year consistency and did not lead to differences in yield. The only exceptional trend was observed in 2017 in the NT-MC treatment, as it had relatively great early-season biomass production and bolls per plant, and greater season-long plant height relative to the CT system, though these differences did not alter yield. No evidence was found that conservation management negatively affected cotton crop development, productivity, or yield at any point during the two growing seasons. Conservation management practices can be implemented by regional producers for the expected ecosystem services, including reduction of erosion and improved soil health, with no negative effects on the cotton crop anticipated.Abbreviations: CT, conventional till; DAP, days after planting; LAI, leaf area index; NAWF, nodes above white flower; NT, no-till; NT-MC, no-till with mixed cover crop; NT-WC, no-till with wheat cover crop.

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Section: Discussionmentioning

confidence: 88%

Growth and development of irrigated cotton in conservation management systems of the Texas Rolling Plains

Adams¹,

Thapa²,

DeLaune³

2020

Agronomy Journal

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“…The variable increases in plant density according to the plant population are due to the ability of the cotton plant to adapt its anatomical structure and physiological functions to accommodate changes in plant density. In a comprehensive review of the effects of plant populations on cotton fiber yields, Adams et al (2019) concluded that populations with densities below 35,000 and above 81,000 plants ha -1 showed reduced fiber productivity. Kaggwa-Asiimwe et al (2013) studied the effects of various plant populations on fiber architecture and yield using two cultivars and concluded that the effects were highly dependent on the cultivar under study.…”

Section: Resultsmentioning

confidence: 99%

Cotton Cultivars X Plant Population in Montividiu, Goiás, Brazil

Torre

Lamas

2021

Rev. Agric. Neotrop.

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This study aimed to evaluate the quantitative and qualitative aspects of production in different populations of cotton cultivars. Ten cultivars were evaluated annually in four plant populations. A randomized block design with split plots and three replicates was used. The cultivars were placed in plots, and the plant populations were placed in the subplots. The following characteristics were evaluated: fiber percentage, fiber yield (kg ha-1), fiber length (mm), the micronaire index, the short fiber index (%), and fiber resistance (gf tex-1). In general, the effect of cultivar was much more important than that of the plant population. These results agree with those obtained by several other authors who have claimed that cotton has a high capacity to adapt to certain population ranges. Thus, considering current seed prices, smaller populations can be used without affecting productivity.

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“…Previously, many studies have been carried out on upgrading crop yield and quality by researchers [2], such as increasing plant population density and nitrogen fertilizer use. However, a suitable population structure requires not only sufficient individuals per unit area but also the rational distribution and uniform development of individuals in the field for maximum utilization of natural resources [3]. Crops grown with high population density that exceed a certain threshold will encounter competition from neighboring vegetation, which restrains plant growth and yield due to limited light, water, and nutrients [4,5].…”

Section: Introductionmentioning

confidence: 99%

Monoseeding Increases Peanut (Arachis hypogaea L.) Yield by Regulating Shade-Avoidance Responses and Population Density

Chen

Zhang

Wang

et al. 2021

Plants

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We aimed to elucidate the possible yield-increasing mechanisms through regulation of shade-avoidance responses at both physiological and molecular levels under monoseeding. Our results revealed that monoseeding decreased the main stem height but increased the main stem diameter and the number of branches and nodes compared to the traditional double- and triple-seeding patterns. The chlorophyll contents were higher under monoseeding than that under double- and triple-seeding. Further analysis showed that this, in turn, increased the net photosynthetic rate and reallocated higher levels of assimilates to organs. Monoseeding induced the expression patterns of Phytochrome B (Phy B) gene but decreased the expression levels of Phytochrome A (Phy A) gene. Furthermore, the bHLH transcription factors (PIF 1 and PIF 4) that interact with the phytochromes were also decreased under monoseeding. The changes in the expression levels of these genes may regulate the shade-avoidance responses under monoseeding. In addition, monoseeding increased pod yield at the same population density through increasing the number of pods per plant and 100-pod weight than double- and triple-seeding patterns. Thus, we inferred that monoseeding is involved in the regulation of shade-avoidance responsive genes and reallocating assimilates at the same population density, which in turn increased the pod yield.

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Determination of a plant population density threshold for optimizing cotton lint yield: A synthesis

Cited by 41 publications

References 18 publications

Growth and development of irrigated cotton in conservation management systems of the Texas Rolling Plains

Growth and development of irrigated cotton in conservation management systems of the Texas Rolling Plains

Cotton Cultivars X Plant Population in Montividiu, Goiás, Brazil

Monoseeding Increases Peanut (Arachis hypogaea L.) Yield by Regulating Shade-Avoidance Responses and Population Density

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