000			02757nab a22003617a 4500
999			_c26964 _d26964
001			G90307
003			MX-TxCIM
005			20210427172910.0
008			200914s2007 xxu|||p|op||| 00| 0 eng d
022			_a0011-183X
022			_a1435-0653 (Online)
024	8		_ahttps://doi.org/10.2135/cropsci2006.12.0779
040			_aMX-TxCIM
041			_aeng
090			_aCIS-5209
100	1		_aSaito, K. _93954
245	1	0	_aPerformance of traditional and improved upland rice cultivars under nonfertilized and fertilized conditions in northern Laos
260			_aMadison (USA) : _bCSSA : _bWiley, _c2007.
340			_aComputer File|Printed
500			_aPeer review
500			_aPeer-review: Yes - Open Access: Yes|http://science.thomsonreuters.com/cgi-bin/jrnlst/jlresults.cgi?PC=MASTER&ISSN=0011-183X
520			_aShortened fallows have reduced the productivity of traditional upland rice (Oryza sativa L.)-based slash-and-burn systems in northern Laos. New cultivars and management methods are needed for food security in the region. To assess their potential for increasing upland rice productivity, this study compared two improved and three traditional upland rice cultivars in three fertilizer treatments: no fertilizer, nitrogen (90 kg N/ha), and N plus phosphate (50 kg P/ha), in six trials over 2 yr. The two improved cultivars had consistently higher grain yields than the traditional cultivars across all fertilizer treatments (3.9 vs. 2.1 t/ha). The improved cultivars had greater total biomass and harvest index, more panicles, and were shorter than the traditional cultivars. They were also more responsive to N without applied P than traditional cultivars. Two of three traditional cultivars gave a response that was similar to the improved cultivars when both N and P were applied. In addition, on-farm trials were conducted at 13 locations to compare the productivity of the improved cultivars with fertilizer (N–P–K 60–26–50 kg/ha) to farmers' practice consisting of traditional cultivars without fertilizer. In these trials, the improved cultivars with fertilizer achieved much higher grain yields than farmers' practice (3.0 vs. 1.8 t/ha). Improved cultivars and moderate inorganic fertilizer application offer a new approach to increasing the productivity of upland rice in Laos.
546			_aText in English
591			_aCrop Science Society of America (CSSA)
650		7	_aAnalysis of variance _91384 _2AGROVOC
650		7	_aHarvest index _2AGROVOC _92155
650		7	_aDry matter _2AGROVOC _96005
700	1		_92252 _aAtlin, G.N.
700	1		_aLinquist, B. _915820
700	1		_aPhanthaboon, K. _915821
700	1		_aShiraiwa, T. _915822
700	1		_aHorie, T. _914778
773	0		_tCrop Science _n635068 _gv. 47, no. 6, p. 2473-2481 _dMadison (USA) : CSSA : Wiley, 2007. _wu444244 _x0011-183X
856	4		_uhttps://hdl.handle.net/20.500.12665/91 _yAccess only for CIMMYT Staff
942			_cJA _2ddc _n0