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008 160499s1998 th uzm rtt 00| a1eng d
035 _a.b11746920
099 9 _aAIT Thesis no. AS-98-16
100 0 _aTo Thi Thu Ha
245 1 0 _aEvaluation and application of crop simulation models in the Red River Delta, Vietnam
260 _aBangkok :
_bAsian Institute of Technology,
_c1998
300 _a114 leaves
490 1 _aThesis ;
_vno. AS-98-16
500 _aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Science, School of Environment, Resources and Development
520 _aVietnam is an agriculture-based country and the majority of its population depends on agriculture for their livelihood. The Red River Delta in Vietnam uses very intensive and diversified cropping systems but is constrained with limited land resources. To use the available land resources judiciously and efficiently, this study was undertaken to optimize the cropping system by using crop simulation models based on the survey data from farmers in Gia Lam district in Hanoi province and Nam Sach district in Hai Hung province in the Red River Delta. CERES-Rice and CERES-Maize of DSSAT3 computer software were used for evaluation and application of the crop model. The crop pattern, crop varieties, and fertilizer management practices are different in Gia Lam and Nam Sach. The relation between observations made from experimental (Ye) and simulated (Ys) results was expressed by equation Ys = 0.99*Ye for rice and Ys = 0.99*Ye for maize. Simulated double rice crop indicated that it would be advisable to adopt short duration variety in spring season and long duration variety in summer season. The optimum nitrogen level was found out to be 130 and 100 kg N/ha in combination with 5 ton FYM/ha in spring and summer season, respectively. Irrigation requirement was found out to be around 150 mm in summer season and 100 mm in spring season. So it could be concluded that crop simulation model can be useful tool together with experiments for optimization crop management in the Red River Delta region in Vietnam
502 _aThesis (M.Sc.) - Asian Institute of Technology, 1998
650 0 _aCropping systems
_zVietnam
_xRed River Delta
650 0 _aCropping systems
_xSimulation methods
700 1 _aHansen, Gunner Kjer,
_eChairperson
700 1 _aSalokhe, Vilas M.,
_eExamination Committee
700 0 _aPreeda Pakpian,
_eExamination Committee
710 2 _aDANIDA, Government of Denmark, Scholarship donor
810 2 _aAsian Institute of Technology.
_tThesis ;
_vno. AS-98-16
856 _3Full-Text
_uhttp://203.159.5.9/ait-thesis/detail.php?q=B13210
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