HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Figures Only Full Text Free Full Text (PDF) Free Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in ISI Web of Science Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via ISI Web of Science (16) Citing Articles via Google Scholar Google Scholar Articles by Kiniry, J. R. Articles by Arnold, J. G. Search for Related Content PubMed Articles by Kiniry, J. R. Articles by Arnold, J. G. Agricola Articles by Kiniry, J. R. Articles by Arnold, J. G. Related Collections Agroclimatology Rice Crop Growth and Development Agricultural Systems Crop Models

RICE

Rice Parameters Describing Crop Performance of Four U.S. Cultivars

^a USDA-ARS, 808 E. Blackland Rd., Temple, TX 76502
^b Texas A&M Agric. Exp. Stn., Box 717, Eagle Lake, TX 77434
^c Beijing Normal Univ., Beijing, China

* Corresponding author (kiniry{at}brc.tamus.edu)

Parameters describing processes of crop growth and yield production provide modelers with the means to simulate crops and provide breeders with a system of comparing cultivars. Such values for rice (Oryza sativa L.) are especially important for some regions in the southern USA. Accordingly, the objective of this study was to quantify key biomass and yield production processes of four rice cultivars common in this region. We measured the leaf area index (LAI), the light extinction coefficient (k) for Beer's law, N concentrations, and the harvest index (HI) for the main and ratoon crops in 1999 and 2000 at Eagle Lake, TX. Dry matter was linearly related to intercepted photosynthetically active radiation (IPAR) for all of the data sets. The mean radiation use efficiency (RUE) was 2.39 g aboveground biomass MJ^-1 IPAR. Maximum LAI values ranged from 9.8 to 12.7, and the mean k value for the main crop was 0.37. The highest main crop yields were 7.04 Mg ha^-1 for Cocodrie in 1999 and 7.22 Mg ha^-1 for Jefferson in 2000. Yield differences among cultivars were due to HI differences and were not related to RUE values. The mean HI was 0.32 for all four cultivars over the two harvests in each of the 2 yr. Consistency in values of RUE, k, N concentrations, and HI among the cultivars in this study and between this study and values reported in the literature will aid modelers simulating rice development and yield and aid breeders in identifying key traits critical to rice grain yield improvement.

Abbreviations: AB, aboveground biomass • HI, harvest index • k, light extinction coefficient for Beer's law • IPAR, photosynthetically active radiation intercepted by plants • LAI, leaf area index • PAR, photosynthetically active radiation • RUE, radiation use efficiency

This article has been cited by other articles:

				W. Yang, S. Peng, R. C. Laza, R. M. Visperas, and M. L. Dionisio-Sese Yield Gap Analysis between Dry and Wet Season Rice Crop Grown under High-Yielding Management Conditions Agron. J., August 11, 2008; 100(5): 1390 - 1395. [Abstract] [Full Text] [PDF]

				J. R. Kiniry and G. W. Evers Radiation Use Efficiency of Arrowleaf, Crimson, Rose, and Subterranean Clovers Agron. J., June 23, 2008; 100(4): 1155 - 1160. [Abstract] [Full Text] [PDF]