Physiological determinants of high yielding ultra-narrow row cotton: Canopy development and radiation use efficiency
作者： R. Brodrick , M.P. Bange , S.P. Milroy , G.L. Hammer
DOI: 10.1016/J.FCR.2012.05.008
关键词: Biomass (ecology) 、 Canopy 、 Leaf area index 、 Interception 、 Photosynthetic efficiency 、 Dry matter 、 Crop 、 Environmental science 、 Agronomy 、 Lint
摘要: Ultra-narrow row cotton (UNR, with rows spaced less than 40 cm apart) has long been proposed to have the potential increase yields while reducing time crop maturity. Investigations shown that biomass accumulation in high-input, high yielding UNR (25 greater 1800 kg lint ha−1) is similar conventionally (100 cm) despite a three-fold plant density, indicating limitation on individual growth. This study investigates whether increased density crops (36 plants m−2) leads differences canopy development, radiation use efficiency (RUE) and light interception contributing growth limitations. Three experiments over three years compared treatments high-input production systems found early development (leaf area index LAI) consequently was higher two of experiments. resulted 17% seasonal extinction coefficient (k) season. However, RUE 19% lower as increases were not accompanied by total dry matter. Light distribution through poorer (higher k) LAI continued after maximum reached, which combined leaf nitrogen concentration may reduced photosynthetic crop. We conclude conversion primary factors responsible for pattern between cotton.
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C.O. Gwathmey, J.D. Clement, Alteration of cotton source–sink relations with plant population density and mepiquat chloride Field Crops Research. ,vol. 116, pp. 101- 107 ,(2010) , 10.1016/J.FCR.2009.11.019
R.C. Muchow, Effect of nitrogen supply on the comparative productivity of maize and sorghum in a semi-arid tropical environment I. Leaf growth and leaf nitrogen Field Crops Research. ,vol. 18, pp. 1- 16 ,(1988) , 10.1016/0378-4290(88)90055-X
Roberto Nunez, Eugene Kamprath, Relationships Between N Response, Plant Population, and Row Width on Growth and Yield of Corn1 Agronomy Journal. ,vol. 61, pp. 279- 282 ,(1969) , 10.2134/AGRONJ1969.00021962006100020030X
Philip H. Jost, J. Tom Cothren, Phenotypic Alterations and Crop Maturity Differences in Ultra‐Narrow Row and Conventionally Spaced Cotton Crop Science. ,vol. 41, pp. 1150- 1159 ,(2001) , 10.2135/CROPSCI2001.4141150X
DA Charles‐Edwards, RJ Lawn, Light interception by grain legume row crops Plant Cell and Environment. ,vol. 7, pp. 247- 251 ,(1984) , 10.1111/1365-3040.EP11589442
J.E. Board, B.G. Harville, M. Kamal, Radiation-use efficiency in relation to row spacing for late-planted soybean Field Crops Research. ,vol. 36, pp. 13- 19 ,(1994) , 10.1016/0378-4290(94)90048-5
Stephen P. Milroy, Michael P. Bange, Nitrogen and light responses of cotton photosynthesis and implications for crop growth Crop Science. ,vol. 43, pp. 904- 913 ,(2003) , 10.2135/CROPSCI2003.9040
Shelby H. Baker, Response of Cotton to Row Patterns and Plant Populations
1 Agronomy Journal. ,vol. 68, pp. 85- 88 ,(1976) , 10.2134/AGRONJ1976.00021962006800010023X
J. A. Andries, J. E. Jones, L. W. Sloane, J. G. Marshall, Effects of Okra Leaf Shape on Boll Rot, Yield, and Other Important Characters of Upland Cotton, Gossypium hirsutum L.1 Crop Science. ,vol. 9, pp. 705- 710 ,(1969) , 10.2135/CROPSCI1969.0011183X000900060009X
Philip H. Jost, J. Tom Cothren, Growth and Yield Comparisons of Cotton Planted in Conventional and Ultra‐Narrow Row Spacings Crop Science. ,vol. 40, pp. 430- 435 ,(2000) , 10.2135/CROPSCI2000.402430X