Response of grain yield to plant density and nitrogen rate in spring maize hybrids released from 1970 to 2010 in Northeast China

Qian, Chunrong; Yu, Yanshan; Gong, Xiu-Jie; Jiang, Yubo; Zhao, Yang; Yang, Zhiyuan; Hao, Yunhong; Li, Liang; Song, Zhenwei; Zhang, Weijian

doi:10.1016/j.cj.2016.04.004

Cited by 65 publications

(51 citation statements)

References 22 publications

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“…In previous studies, higher plant density resulted in lower N uptake per plant, but significantly increased the N accumulation per area, irrespective of the soil conditions (Xu et al, 2017a; Nelson et al, 2015). Our LA results are in agreement with Li et al (2018) and Qian et al (2016). These authors also found that the LA per plant decreased linearly with increasing plant population under diverse soil and climate conditions.…”

Section: Discussionsupporting

confidence: 94%

“…Many studies have pointed out the contribution of plant populations to increasing maize‐grain yield in modern hybrids in several maize‐producing countries in recent decades (Chen et al, 2016; Di Matteo et al, 2016; Qian et al, 2016; Lee and Tollenaar, 2007; Sangoi et al, 2002). Recently, Assefa et al (2018) quantified the contribution of plant population to North American maize yield from 1987 to 2016, and concluded that plant population contribution to maize gain yield ranged from 8.5 to 17% during that time.…”

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confidence: 99%

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Agronomic Responses of Maize Hybrids to Row Spacing and Plant Population in the Summer and Winter Seasons in Brazil

et al. 2019

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Brazil has two growing seasons for maize (Zea mays L.) production: summer and winter. The additional maize produced in the winter and the high-yielding opportunities in the summer season make it important to understand responses of maize hybrids to row spacing and plant population across the two annual Brazilian growing seasons. In the 2015 to 2016 summer season and the 2016 winter season, maize response to plant population, ranging from 60,000 to 90,000 plants ha -1 , was evaluated for three hybrids in 0.45-, 0.60-, 0.75-, and 0.90-m row spacing. Plant architecture traits, grain yield and yield components did not differ with row spacing, and their responses to plant population were not affected by hybrid type and/or row spacing. The DKB390PRO2 hybrid (single cross) demonstrated better grain yield performance in the summer, whereas the BG7049YH hybrid (three-way cross) had the highest yield in the winter. Plant and ear height increased linearly in response to plant population in the summer season, whereas other plant architecture traits, ear leaf chlorophyll concentration, and grain yield components decreased linearly with increasing plant populations in both seasons. There was a quadratic response in maize grain yield to plant population, and it was maximized with 78,688 plants ha -1 in the summer, and 71,206 plants ha -1 in the winter. Our results show preliminary evidence that regardless of row spacing, maize grain yield can be maximized with DKB390 hybrid (single cross) with 78,500 plants ha -1 in the summer, and BG7049YH hybrid (three-way) with 71,000 plants ha -1 in the winter season.

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Section: Discussionsupporting

confidence: 94%

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confidence: 99%

Agronomic Responses of Maize Hybrids to Row Spacing and Plant Population in the Summer and Winter Seasons in Brazil

et al. 2019

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“…In this study, the response of maize yield to plant density differed in all the years. Qian et al (2016) also found that the maize yield showed a parabolic relationship with plant density. These results are in agreement with Ren et al (2016) who reported that there was a parabolic relationship between plant density and grain yield except in an extremely dry year.…”

Section: Effects Of Plant Density On Et Yield and Wpmentioning

confidence: 89%

“…These results are in agreement with Ren et al (2016) who reported that there was a parabolic relationship between plant density and grain yield except in an extremely dry year. Qian et al (2016) also found that the maize yield showed a parabolic relationship with plant density. It is reasonable because the maize yield was determined by the grain yield per plant and number of plants per unit area.…”

Section: Effects Of Plant Density On Et Yield and Wpmentioning

confidence: 89%

“…In 2015 (a moderately dry year), the maize yield first increased and then decreased with the increase of plant density from 67 500 to 97 500 plants per ha. The low plant density had a low yield attributed to the limitation of ears per unit area (Qian et al, 2016). Qian et al (2016) also found that the maize yield showed a parabolic relationship with plant density.…”

Section: Effects Of Plant Density On Et Yield and Wpmentioning

confidence: 93%

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Plastic Mulch and Plant Density Influencing Soil Water Content and Yield of Rainfed Maize in North‐Eastern China

Sun

Chen

Jiang

et al. 2018

Irrigation and Drainage

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Plastic mulch, in combination with high plant density, is a common practice for rainfed maize production in north‐eastern China. However, the influence of these practices on soil water storage, maize yield and maize water productivity in different precipitation years is not well understood. In this paper, a 3‐year split‐plot field experiment was designed to compare non‐mulching and plastic film mulching in maize at 67 500 and 82 500 plants per ha in 2013, 2014 and 2015, and also 97 500 plants per ha in 2014 and 2015. Results revealed an increasing trend of precipitation in the study area from 1962 to 2015 and that the number of dry years and extreme years (including extreme dry and wet years) was increasing. In the moderately wet year 2013 and the moderately dry year 2015, the combination of 82 500 plants per ha and plastic film mulching produced the highest yield and water productivity (8.2 t ha−1, 1.7 kg m−3 and 8.3 t ha−1, 2.3 kg m−3, respectively) for maize, while in the extremely dry year 2014 the highest yield (5.6 t ha−1) occurred with 97 500 plants per ha and non‐mulching. This research might be helpful for smallholder farmers needing optimal agricultural strategies to improve maize production in rainfed areas of north‐east China. © 2018 John Wiley & Sons, Ltd.

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Narrow rows and high maize plant population improve water use and grain yield under conservation agriculture

Haarhoff

Swanepoel

2020

Agronomy Journal

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The relationship between maize (Zea mays L.) population density and grain yield is influenced by soil and crop management strategies, including Conservation Agriculture (CA). However, little is known about the response of maize grain yield to varying plant population and/or row spacing under CA. A 3-yr study was conducted under CA to evaluate the effects of plant population and row spacing on maize grain yield, plant available soil water, and soil temperature. Plant populations ranging from 40,000 to 80,000 plants ha −1 were evaluated at three row spacings (0.5, 0.76, and 1.0 m). The response of maize grain yield to plant population was highly variable between seasons: it was not affected by plant population in the season with the highest early season rainfall but increased with increasing plant population in the driest season and in the season with well-distributed, near average rainfall. Higher plant populations resulted in lower soil water levels, presumably due to greater water extraction. Plant population affected soil water availability in the 20-to 80-cm soil layer in Season 2, while plant population affected soil water availability at all soil layers except the 10-to 20-and 60-to 80-cm soil layers in Season 3. Rapid maize leaf-canopy closure provided by increased plant population and narrower row spacing is critical to adequately utilize the benefits associated with CA.Abbreviations: CA, conservation agriculture; DAE, days after emergence; FWC, field water capacity; PPAW, percent plant available water; PWP, permanent wilting point. How to cite this article:Haarhoff SJ, Swanepoel PA. Narrow rows and high maize plant population improve water use and grain yield under conservation agriculture. Agronomy Journal. 2020;112:921-931.

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Response of grain yield to plant density and nitrogen rate in spring maize hybrids released from 1970 to 2010 in Northeast China

Cited by 65 publications

References 22 publications

Agronomic Responses of Maize Hybrids to Row Spacing and Plant Population in the Summer and Winter Seasons in Brazil

Agronomic Responses of Maize Hybrids to Row Spacing and Plant Population in the Summer and Winter Seasons in Brazil

Plastic Mulch and Plant Density Influencing Soil Water Content and Yield of Rainfed Maize in North‐Eastern China

Narrow rows and high maize plant population improve water use and grain yield under conservation agriculture

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