000			03633cas|a2200433 a 4500
005			20260818214041.0
008			310300s1999 th uu|m rtt 0| a1eng d
035			_a.b11783692
099		9	_aAIT Thesis no.AC-99-18
100	0		_aNguyen Hong Thuy
245	1	0	_aSimulation for sustainable intensive rice cultivation in Tien Giang province, Mekong river delta, Vietnam
260			_aBangkok : _bAsian Institute of Technology, _c1999
300			_a149 leaves
490	1		_aThesis ; _vno. AC-99-18
500			_aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Science, School of Environment, Resources and Development
502			_aThesis (M.Sc.) - Asian Institute of Technology, 1999
520			_aThe target area was Cai Lay district, which is the most intensive rice cultivation in Mekong River Delta. The study was based on primary data collected through farmer survey. These data were applied for farming system analyses and also for model validation. Experimental data were collected from experimental stations and provincial offices and applied for model validation. The CERES-rice model were then applied for optimization the intensified cropping system in the Mekong River Delta. The results indicate that farmers used too much nitrogen causing losses and low nitrogen recovery fraction. Farmers 'yield declined at nitrogen application above 50 kg N/ha. At nitrogen level up to 80 kg N/ha, there was a good agreement between observed and simulated data. Above 80 kg N, the simulated results were above the observed ones. This is due to frequent logging. Based upon model validation, the CERES-rice model can be applied for prediction of nitrogen and rice cultivation management in alluvial soils in Mekong River Delta. By simulation, it was found that to obtain highest yield and high nitrogen recovery fraction, at high rates, nitrogen should be applied into three splits. Optimum nitrogen fertilizer can be replaced by 80% of the available soil nitrogen. Simulated results vary between 67-185 kg N/ha according to the amount of available soil nitrogen before sowing. Using 25-year simulated weather condition and present price variation and the Gini-dominance approach, the optimum was found to be 100 kg N/ha.
650		0	_aSustainable agriculture _zVietnam _zTien Giang
650		0	_aRice _xPlanting _zVietnam _zTien Giang
700	1		_aHansen, Gunner Kjer, _eChairperson
700	1		_aSalokhe, Vilas M., _eExamination Committee
700	0		_aPreeda Parkpian, _eExamination Committee
710	2		_aSida (Government of Sweden), _eScholarship Donor
710	2		_aSida and Danida (Government of Denmark), _eResearch Grant Donor
810	2		_aAsian Institute of Technology. _tThesis ; _vno. AC-99-18
856			_3Full-Text _uhttp://203.159.5.9/ait-thesis/detail.php?q=B12170
907			_a.b11783692 _bmnait _cu
902			_a240329
998			_b0 _c000331 _dm _ea _fu _g0
945			_lmnait
945			_lmnait
945			_lmnarc
942			_c20
942			_c40
909			_aBarcode : 30050120585632 _bCREATED : 1998-01-11 _cRECORD # : i12184718 _dLPATRON : 1019813 _eLCHKIN : 2007-04-04 _f# RENEWALS : 0 _g# OVERDUE : 0 _hIUSE3 : 0 _iTOT CHKOUT : 2 _jTOT RENEW : 1
909			_aBarcode : 30050120585608 _bCREATED : 1998-01-11 _cRECORD # : i1218472x _dLPATRON : 1019813 _eLCHKIN : 2007-03-19 _f# RENEWALS : 0 _g# OVERDUE : 0 _hIUSE3 : 0 _iTOT CHKOUT : 3 _jTOT RENEW : 0
909			_aBarcode : 30050160053681 _bCREATED : 2016-05-18 _cRECORD # : i12982787 _dLPATRON : 0 _eLCHKIN : - _f# RENEWALS : 0 _g# OVERDUE : 0 _hIUSE3 : 0 _iTOT CHKOUT : 0 _jTOT RENEW : 0
999			_c107076 _d107076