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 (19) Citing Articles via Google Scholar Google Scholar Articles by George, T. Articles by Quiton, J. Search for Related Content PubMed Articles by George, T. Articles by Quiton, J. Agricola Articles by George, T. Articles by Quiton, J. Related Collections Turfgrass Management Rice Crop Rotation Systems Tropical Soils Dryland Cropping Systems Crop Systems Nutrient Management Soil Fertility and Productivity

PRODUCTION PAPER

Rapid Yield Loss of Rice Cropped Successively in Aerobic Soil

^a Univ. of Hawaii, 1955 East West Road, Agric. Sci. 205, Honolulu, Hawaii 96822, and Int. Rice Res. Inst. (IRRI), DAPO Box 7777, Metro Manila, Philippines
^b IRRI, DAPO Box 7777, Metro Manila, Philippines
^c ICRAF, United Nations Ave., P.O. Box 30677, Nairobi, Kenya

* Corresponding author (tgeorg1{at}attglobal.net)

Received for publication December 3, 2001. Upland rice (Oryza sativa L.), commonly considered to be low yielding, can be high yielding if the genotype is improved for harvest index (HI) and the crop is grown relatively free from nutrient and drought stresses. We examined whether high and stable rice yields could be obtained in aerobic soil. In four experiments of 1- to 3-yr duration, lime, N, and P were inputs for wet-season upland rice ‘UPLRi-5’ in a favorable rainfed Oxisol. In a 3-yr experiment consisting of two crops per year in an irrigated Ultisol, different lowland and upland varieties were grown in limed and fertilized aerobic soil. First-season rainfed UPLRi-5 yield varied from 1.5 to 7.4 Mg ha^-1, with low yields in fields receiving low early-season rainfall. With irrigation, the lowland hybrid ‘Magat’ yielded 7.8 Mg ha^-1 vs. 2.1 Mg ha^-1 for traditional upland rice ‘Lubang Red’. Magat's high yield was associated with a HI of 0.43 in contrast to 0.31 of improved upland rice variety ‘Apo’ and 0.17 of Lubang Red. Whether the crop was rainfed or irrigated, yield loss was rapid following the first season: Grain yields decreased by up to 73% for rainfed UPLRi-5 in the second to third season. In the irrigated upland, yield loss in the second to fourth season was reflected in a 16 to 79% decline in 10-wk biomass. Here, the 13-wk biomass in the fifth crop was only half that of the simultaneously grown first-season crop. We conclude that while promise exists for high-yielding rice in aerobic soil, the rapid yield loss with successive rice cropping must first be overcome.

Abbreviations: HI, harvest index • NERICA, New Rice for Africa

This article has been cited by other articles:

				K. Saito, G. N. Atlin, B. Linquist, K. Phanthaboon, T. Shiraiwa, and T. Horie Performance of Traditional and Improved Upland Rice Cultivars under Nonfertilized and Fertilized Conditions in Northern Laos Crop Sci., November 7, 2007; 47(6): 2473 - 2481. [Abstract] [Full Text] [PDF]

				R. Venuprasad, H. R. Lafitte, and G. N. Atlin Response to Direct Selection for Grain Yield under Drought Stress in Rice Crop Sci., February 6, 2007; 47(1): 285 - 293. [Abstract] [Full Text] [PDF]