TY  - SER
AU  - Samiano,Arsenio R.
AU  - Upasena,Selawa H.
AU  - Gartner,Joseph A.
AU  - Sumitra Poovarodom
ED  - International Development Research Centre, Canada, 
TI  - The agronomic performance of four Sesbania species as affected by phosphorus fertilizer and their influence yield of irrigated transplanted rice on an acid sulphate soil
T2  - Thesis
PY  - 1990///
CY  - Bangkok
PB  - Asian Institute of Technology
KW  - Rice
KW  - Research
KW  - Fertilizers and manures
N1  - A thesis submitted in partial fulfilment of the requirements of the degree of Master of Science, School of Environment, and Development; Thesis (M.Sc.) - Asian Institute of Technology, 1990
N2  - The agronomic performance of four leguminous green manure  s p e c i es ~f.?...?J!a rt ~i <-"!. r-o ~lLsl t c:Lt:.. f.~ .. -""ls_~J_J..{u00A7}ti:.!.l:..fu_ [~.f! __ <;.._tlJ.:..K..€.!El.Y_ and B f;...h .i. n<EJ. we r e  evaluated as pre rice green manure on an acid sulphate s oil.  Phosporous (triple superphosphate) was basally applied at the  rate of 0, 50, and 100 kilograms per hectare respec tively to  determine its effect on the growth and d eve lopment of these  Ellf.i!.:~fl:L~!.1L ~.. The rice variety RD-23 was transplanted one week  after incorporation of green manure. Nitrogen fertiliz er was  topdressed at the rate of 0, 20, 40, and 80 kilograms p e r hectar e  to determine the response of rice crop to added inorganic N  fertilizer.  The results show that all the species of green manure wer e  photosensitive and flowered 35 days after emergence. Significant  differences were observed on some agronomic characteristics. With  added P, the plants were taller, more nodule s were produced, and  highe r biomass was obtained than from the control. No s ignificant  differences was obtained ·in any paramet e r as the rate of  application of P was increased from 50 to 100 kilograms per  hectare. Biomass production was greatly affected by date of  planting of green manure. Green manure planted in March has a  higher biomass produced than those planted in November, and their  N accumulation in all the species was hig h.  With added inorgani c N, the grain yield, the weig ht of 1,000  grains, tiller number and straw yield were increased .This  relationship was found to be linear a s the rate of applied N is  increased. The grain yield, the straw yield, and the plant  heights were significantly higher with 80 kg of N applied . The N  and P uptake increased in both the rice grain and the straw with  increased levels of applied P and N . However, higher N and P  uptake was observe d in the grain than in the straw
UR  - http://203.159.5.9/ait-thesis/detail.php?q=B18284
ER  -