| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
|
|
|
|||||||
|
|||||||||
a Dep. of Plant and Soil Sci., Oklahoma State Univ., 368 Agricultural Hall, Stillwater, OK 74078
b Dep. of Crop, Soil, and Environ. Sci., Univ. of Arkansas, 1366 W Altheimer Drive, Fayetteville, AR 72704
c USDA-ARS, Portageville, MO 63873
* Corresponding author (lpurcell{at}uark.edu)
Received for publication July 12, 2004.
The midsouthern USA typically has a mid- to late-summer drought that limits the productivity of nonirrigated maize (Zea mays L.) production. We hypothesized that by increasing seeded population and narrowing row spacing, short-season maize hybrids in the Midsouth would have similar yield but require less irrigation compared with hybrids currently grown. Irrigated experiments were conducted at Fayetteville, AR, in 2001, 2002, and 2003 and at Keiser, AR, in 2002 and 2003. Factors evaluated included maize maturity (75- to 110-d maize hybrids) and maize seeded population (5 to 20 seed m–2) sown in 50-cm rows. Between emergence and black layer, short-season maize hybrids required 30 to 50% less irrigation than did their full-season counterparts. Yield of short-season maize at high plant populations (
19 plants m–2) was equal to that of full-season hybrids, which reached maximum yield at lower plant populations (8 plants m–2). Maize biomass at maturity had a linear relationship with cumulative intercepted photosynthetically active radiation (CIPAR) from emergence to maturity, but maize yield had an asymptotic relationship with CIPAR with little increase in yield for CIPAR above 555 MJ m–2. This research indicates that increasing plant population for short-season maize hybrids increased CIPAR, which compensated for a short growing season to achieve similar potential yield to full-season hybrids in the Midsouth with substantially less irrigation.
Abbreviations: CIPAR, cumulative intercepted photosynthetically active radiation • HI, harvest index • PAR, photosynthetically active radiation • RUE, radiation use efficiency
This article has been cited by other articles:
|
|
 |
|
  P. R. Capristo, R. H. Rizzalli, and F. H. Andrade Ecophysiological Yield Components of Maize Hybrids with Contrasting Maturity Agron. J., June 26, 2007; 99(4): 1111 - 1118. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
T. Sarlangue, F. H. Andrade, P. A. Calvino, and L. C. Purcell Why Do Maize Hybrids Respond Differently to Variations in Plant Density? Agron. J., June 5, 2007; 99(4): 984 - 991. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
M. Popp, J. Edwards, P. Manning, and L. C. Purcell Plant Population Density and Maturity Effects on Profitability of Short-Season Maize Production in the Midsouthern USA Agron. J., May 3, 2006; 98(3): 760 - 765. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 J. T. Edwards and L. C. Purcell Soybean Yield and Biomass Responses to Increasing Plant Population Among Diverse Maturity Groups: I. Agronomic Characteristics Crop Sci., August 1, 2005; 45(5): 1770 - 1777. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J. T. Edwards, L. C. Purcell, and D. E. Karcher Soybean Yield and Biomass Responses to Increasing Plant Population among Diverse Maturity Groups: II. Light Interception and Utilization Crop Sci., August 1, 2005; 45(5): 1778 - 1785. [Abstract] [Full Text] [PDF]
|
|
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
| The SCI Journals | Crop Science | Vadose Zone Journal | |||
| Journal of Natural Resources and Life Sciences Education |
Soil Science Society of America Journal | ||||
| Journal of Plant Registrations | Journal of Environmental Quality |
The Plant Genome | |||
