Effects of plant density on the aboveground dry matter and radiation-use efficiency of field corn

Li, Yi-Chin; Dai, Hung-Yu; Chen, Hungyen

doi:10.1371/journal.pone.0277547

Cited by 6 publications

(6 citation statements)

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“…In addition to the optimized position of the crop cycle within the growing season, the results of the present study have also shown the advantage of applying a high plant density (HiD) for maize, compared to the standard one (StD), to obtain a high methane yield, which had previously been reported for both maize grain [24] and biomass [55]. The enhanced plant density increased the lead area index [56], thus leading to a positive result on the cumulative amount of intercepted incident photosynthetically active radiation and, consequently, on maize biomass production [57]. Moreover, the increase in plant density did not change the BMP of whole-crop maize, thus confirming previous finding [16,55].…”

Section: Discussionsupporting

confidence: 75%

Biomass and Methane Production in Double Cereal Cropping Systems with Different Winter Cereal and Maize Plant Densities

et al. 2023

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The biogas supply chain requires a correct combination of crops to maximize the methane yield per hectare. Field trials were carried out in North Italy over three growing seasons, according to a factorial combination of four cropping systems (maize as a sole-crop or after hybrid barley, triticale and wheat) and two maize plant densities (standard, 7.5 plants m−2 and high, 10 plants m−2) with the plants harvested as whole-crop silage. The specific methane production per ton was measured through the biochemical methane potential (BMP) method, while the methane yield per hectare was calculated on the basis of the BMP results and considering the biomass yield. The average methane yield of wheat resulted to be equal to 4550 Nm3 ha−1, and +17% and +28% higher than triticale and barley, respectively, according to the biomass yield. A delay in maize sowing reduced the yield potential of this crop; the biomass of maize grown after barley, triticale and wheat was 20%, 33% and 47% lower, respectively, than maize cultivated as a single crop. The high plant population increased the biomass yield in the sole-crop maize (+23%) and in the maize grown after barley (+20%), compared to the standard density. The highest biomass (32 t ha−1 DM) and methane yield (9971 Nm3 ha−1) within the cropping systems were obtained for barley followed by maize at a high plant density. This cropping system increased the methane yield by 46% and 18%, respectively, compared to the sole-crop maize or maize after triticale at a standard density. The smaller amount of available solar radiation, resulting from the later sowing of maize, reduced the advantage related to the application of a high plant density.

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Section: Discussionsupporting

confidence: 75%

Biomass and Methane Production in Double Cereal Cropping Systems with Different Winter Cereal and Maize Plant Densities

et al. 2023

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“…In addition, cultivars used in the early period of the experiments are no longer cultivated today. It is also difficult to thoroughly account for other factors that may affect crop growth, such as soil fertility, insects, disease, and plant density ( Altieri & Nicholls, 2003 ; Chen, Yamagishi & Kishino, 2014 ; Chen et al, 2019 ; Chen, 2019 ; Li, Dai & Chen, 2022a , 2022b ); as well as for human-induced effects, such as improving technology, modern management, and differences in practices of cultivators ( Chen, 2018 , 2019 ), especially for over nine decades of observations. Nowadays, climate change also includes the increasing frequency of extreme climatic events, which results in frequent agricultural meteorological disasters.…”

Section: Discussionmentioning

confidence: 99%

Temporal variation of the relationships between rice yield and climate variables since 1925

Chen,

Wu,

Teng

2023

PeerJ

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Background Long-term time-series datasets of crop yield and climate variables are necessary to study the temporal variation of climate effects on crops. The aim of this study was to broadly assess assessment of the effects of climate on rice, and the associated temporal variations of the effects during the long-term period. Methods We conducted field experiments in Taiwan from 1925 to 2019 to collect and analyze rice yield data and evaluate the impacts of changes in average temperature, diurnal temperature range (DTR), rainfall, and sunshine duration on rice yield during cool and warm cropping seasons. We then estimated the relationships between annual grain yield and the climate variables using the time series of their first difference values. We also computed the total relative and annual actual yield changes using regression coefficients for each climate variable for the intervals 1925–1944, 1945–1983, and 1996–2019 to reveal the impacts of climate change on yields and the associated temporal variations during the overall experimental period. Results The annual daily average temperature calculated from the trend of the regression lines increased by 0.94–1.03 °C during the 95-year period. The maximum temperature remained steady while the minimum temperature increased, leading to decreased DTR. The total annual rainfall decreased by 237–352 mm and the annual total sunshine duration decreased by 93.9–238.9 h during the experimental period. We observed that during the cool cropping season, yield response to temperature change decreased, while that to DTR and rainfall changes increased. During the warm cropping season, all the yield responses to temperature, DTR, and rainfall changes were negative throughout the experimental period. In recent years (1996–2019) the estimated annual actual rice yield changes during the cool cropping season were negatively affected by climate variables (except for sunshine duration), and slightly positively affected (except for temperature) during the warm cropping season. Compared to the effects of temperature and DTR, those of rainfall and sunshine duration on rice yield changes were weak. This study contributes to provide impacts of climate change on rice yield and associated long-term temporal variations over nearly a century.

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“…Wheat yield under suitable water and nutrient conditions has been demonstrated to be closely associated with the amount of radiation intercepted during the growing season [1]. The primary abiotic variables influencing crop growth, development, and yield are temperature, moisture content, and nutrient availability.…”

Section: Introductionmentioning

confidence: 99%

Effect of Different Thermal Regimes and Moisture Levels on the Growth Parameters of Wheat (Triticum aestivum L.) Crop Grown under Agro-climatic Conditions of Eastern Uttar Pradesh, India

Pandey,

Mishra,

Singh

et al. 2024

IJECC

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A field experiment was carried out at Agrometeorological Research Farm, Acharya Narendra Deva University of Agriculture & Technology, Kumarganj, Ayodhya (U.P.) during rabi season of 2022-23 and 2023-24 to investigate the influence of different thermal regimes and moisture levels on wheat growth parameters, including phenophases occurrence, leaf area index (LAI), plant height, and dry matter accumulation at various stages of crop development. The experiment comprised twelve treatment combinations and conducted in split plot design and replicated four times. Treatment consisted of three thermal regimes viz. 15th November, 25th November and 5th December with four moisture levels viz, I1 at CRI (crown root initiation) , I2- CRI+tillering, I3- CRI+ jointing and milking, I4- CRI+ jointing +anthesis and dough stage. Results reveal that Plant height (cm), dry matter accumulation (gm-2) and leaf area index increased significantly at all the stages of crop growth . Highest values are recorded with the crop thermal regime on 15th November followed by 25th November. Lowest values of all were recorded in 5th December thermal regime. Among the moisture levels, I4- (CRI+ jointing +anthesis and dough stage) took relatively longer duration for maturirty compared to levels I3, I2 and I1.. These findings underscore the importance of carefully managing both temperature and moisture conditions to optimize wheat growth and development. This research contributes to the broader understanding of crop responses to thermal regimes/date of sowing and provides valuable insights for moisture management strategies aimed at improving crop yield and resilience in the face of changing climate conditions.

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Effects of plant density on the aboveground dry matter and radiation-use efficiency of field corn

Cited by 6 publications

References 49 publications

Biomass and Methane Production in Double Cereal Cropping Systems with Different Winter Cereal and Maize Plant Densities

Biomass and Methane Production in Double Cereal Cropping Systems with Different Winter Cereal and Maize Plant Densities

Temporal variation of the relationships between rice yield and climate variables since 1925

Effect of Different Thermal Regimes and Moisture Levels on the Growth Parameters of Wheat (Triticum aestivum L.) Crop Grown under Agro-climatic Conditions of Eastern Uttar Pradesh, India

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