Effect of planting density on root lodging resistance and its relationship to nodal root growth characteristics in maize (Zea mays L.)

Shengqun Liu; Fengbin Song; Fulai Liu; Xiancan Zhu; Haibo Xu

doi:10.5539/jas.v4n12p182

Effect of planting density on root lodging resistance and its relationship to nodal root growth characteristics in maize (Zea mays L.)

Shengqun Liu, Fengbin Song, Fulai Liu, Xiancan Zhu, Haibo Xu

Abstract

Increase of planting density has been widely used to increase grain yield in maize. However, it may lead to higher risk of root lodging hence causing significant yield loss of the crop. The objective of this study was to investigate the effect of planting density on maize nodal root growth characteristics and to analyse their relationships to root lodging resistance. Field experiment was conducted in 2010 and 2011, using two maize varieties, Zhengdan 958 (ZD) and Xianyu 335 (XY), under three planting densities, viz., 4.50, 8.25 and 12.00 plants m-2. The results showed the root failure moment, an indicator of root lodging resistance, was significantly affected by the planting density, the maize variety, as well as the crop developmental stages, and was decreased with increasing planting density. The number and the average diameter of the roots on the upper internodes (phytomer 5 to 8) were decreased with increasing planting density, whereas the maize variety had little effects on those variables. On the contrary, the root angle was less responsive to planting density but was significantly affected by the variety being that XY had larger root angle than did ZD. The root failure moment was linearly positively correlated with the total root number and the average root diameter on the upper internodes, indicating that a greater root number and a larger root diameter are important traits for enhancing root lodging resistance in maize plants.

Original language	English
Journal	Journal of Agricultural Science
Volume	4
Issue number	12
Pages (from-to)	182-189
Number of pages	8
ISSN	1916-9752
DOIs	https://doi.org/10.5539/jas.v4n12p182
Publication status	Published - 2012

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@article{15da45d1d022451ebdd3b729d3165d79,

title = "Effect of planting density on root lodging resistance and its relationship to nodal root growth characteristics in maize (Zea mays L.)",

abstract = "Increase of planting density has been widely used to increase grain yield in maize. However, it may lead to higher risk of root lodging hence causing significant yield loss of the crop. The objective of this study was to investigate the effect of planting density on maize nodal root growth characteristics and to analyse their relationships to root lodging resistance. Field experiment was conducted in 2010 and 2011, using two maize varieties, Zhengdan 958 (ZD) and Xianyu 335 (XY), under three planting densities, viz., 4.50, 8.25 and 12.00 plants m-2. The results showed the root failure moment, an indicator of root lodging resistance, was significantly affected by the planting density, the maize variety, as well as the crop developmental stages, and was decreased with increasing planting density. The number and the average diameter of the roots on the upper internodes (phytomer 5 to 8) were decreased with increasing planting density, whereas the maize variety had little effects on those variables. On the contrary, the root angle was less responsive to planting density but was significantly affected by the variety being that XY had larger root angle than did ZD. The root failure moment was linearly positively correlated with the total root number and the average root diameter on the upper internodes, indicating that a greater root number and a larger root diameter are important traits for enhancing root lodging resistance in maize plants.",

author = "Shengqun Liu and Fengbin Song and Fulai Liu and Xiancan Zhu and Haibo Xu",

year = "2012",

doi = "10.5539/jas.v4n12p182",

language = "English",

volume = "4",

pages = "182--189",

journal = "Journal of Agricultural Science",

issn = "1916-9752",

publisher = "Canadian Center of Science and Education (CCSE)",

number = "12",

}

TY - JOUR

T1 - Effect of planting density on root lodging resistance and its relationship to nodal root growth characteristics in maize (Zea mays L.)

AU - Liu, Shengqun

AU - Song, Fengbin

AU - Liu, Fulai

AU - Zhu, Xiancan

AU - Xu, Haibo

PY - 2012

Y1 - 2012

N2 - Increase of planting density has been widely used to increase grain yield in maize. However, it may lead to higher risk of root lodging hence causing significant yield loss of the crop. The objective of this study was to investigate the effect of planting density on maize nodal root growth characteristics and to analyse their relationships to root lodging resistance. Field experiment was conducted in 2010 and 2011, using two maize varieties, Zhengdan 958 (ZD) and Xianyu 335 (XY), under three planting densities, viz., 4.50, 8.25 and 12.00 plants m-2. The results showed the root failure moment, an indicator of root lodging resistance, was significantly affected by the planting density, the maize variety, as well as the crop developmental stages, and was decreased with increasing planting density. The number and the average diameter of the roots on the upper internodes (phytomer 5 to 8) were decreased with increasing planting density, whereas the maize variety had little effects on those variables. On the contrary, the root angle was less responsive to planting density but was significantly affected by the variety being that XY had larger root angle than did ZD. The root failure moment was linearly positively correlated with the total root number and the average root diameter on the upper internodes, indicating that a greater root number and a larger root diameter are important traits for enhancing root lodging resistance in maize plants.

AB - Increase of planting density has been widely used to increase grain yield in maize. However, it may lead to higher risk of root lodging hence causing significant yield loss of the crop. The objective of this study was to investigate the effect of planting density on maize nodal root growth characteristics and to analyse their relationships to root lodging resistance. Field experiment was conducted in 2010 and 2011, using two maize varieties, Zhengdan 958 (ZD) and Xianyu 335 (XY), under three planting densities, viz., 4.50, 8.25 and 12.00 plants m-2. The results showed the root failure moment, an indicator of root lodging resistance, was significantly affected by the planting density, the maize variety, as well as the crop developmental stages, and was decreased with increasing planting density. The number and the average diameter of the roots on the upper internodes (phytomer 5 to 8) were decreased with increasing planting density, whereas the maize variety had little effects on those variables. On the contrary, the root angle was less responsive to planting density but was significantly affected by the variety being that XY had larger root angle than did ZD. The root failure moment was linearly positively correlated with the total root number and the average root diameter on the upper internodes, indicating that a greater root number and a larger root diameter are important traits for enhancing root lodging resistance in maize plants.

U2 - 10.5539/jas.v4n12p182

DO - 10.5539/jas.v4n12p182

M3 - Journal article

SN - 1916-9752

VL - 4

SP - 182

EP - 189

JO - Journal of Agricultural Science

JF - Journal of Agricultural Science

IS - 12

ER -