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008			060709s2005 th uu|m rtt 0| a1eng d
035			_a.b11991513
099		9	_aAIT Thesis no.AE-05-04
100	1		_aDhakal, Uttam
245	1	0	_aDevelopment of a greenhouse nutrient recycling system
260			_aPathum Thani, Thailand : _bAsian Institute of Technology, _c2005
300			_a79 leaves : _bill.
490	1		_aThesis ; _vno. AE-05-04
500			_aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Environment, Resources and Development
502			_aThesis (M.Eng.) - Asian Institute of Technology, 2005
520			_aTomato (Lycopersicon esculentum Mill., var. FMTT-260) plants were grown under two identical poly-net greenhouses at Protected Cultivation Project site on AIT campus, Thailand. One greenhouse was equipped with nutrient recycling system to assess the amount of water and nutrients saved and compare growth and development of plants, crop yield and fruit qualities. Bio-sand filter was used to disinfect pathogens of recirculating solution. The electrical conductivity of the daily collected overdrain was adjusted to the set value of 1.5 mS cm and recirculated. Recirculation of nutrient solution could save 31.5% of total irrigation water. Among the measured major plant essential elements, the potential saving of nitrogen, phosphorus, potassium and calcium were 29.87%, 31.44%, 29.83% and 28.16% respectively. The break even of the additional cost of nutrient recycling was less than 5 seasons. The total crop yield of the nutrient recycled greenhouse was statistically similar to that of control greenhouse. Plant growth parameters (plant height, stem diameter and leaf area index), average size and weight of fruits, and fruit qualities (marketable fruits, color, firmness, moisture content, brix and pH) of nutrient recycled greenhouse were almost similar to that of control greenhouse. Distribution uniformity and emitter flow rate in both greenhouses were similar, about 95 and 93% respectively. Due to recycling, the water productivity was increased by 45.7%.
650		0	_aPlant nutrients _zTropics
650		0	_aGreenhouse plants _zTropics
700	1		_aSalokhe, Vilas M., _eChairperson
700	1		_aJayasuriya, H.P.W., _eExamination Committee
700	1		_aMax, Johannes, _eExamination committee
710	2		_aAsian Development Bank - Japan Scholarship Program, _eScholarship donor
810	2		_aAsian Institute of Technology. _tThesis ; _vno. AE-05-04
856			_3Full-Text _uhttp://203.159.5.9/ait-thesis/detail.php?q=B11167
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902			_a240401
998			_b0 _c060709 _dm _ea _fu _g0
945			_lmnait
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909			_aBarcode : 30050120576250 _bCREATED : 2013-08-07 _cRECORD # : i12735978 _dLPATRON : 1027528 _eLCHKIN : 2018-04-25 _f# RENEWALS : 0 _g# OVERDUE : 0 _hIUSE3 : 0 _iTOT CHKOUT : 1 _jTOT RENEW : 0
909			_aBarcode : 30050120370688 _bCREATED : 2016-02-06 _cRECORD # : i13014456 _dLPATRON : 0 _eLCHKIN : - _f# RENEWALS : 0 _g# OVERDUE : 0 _hIUSE3 : 0 _iTOT CHKOUT : 0 _jTOT RENEW : 0
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