| Author | Samiano, Arsenio R. |
| Call Number | AIT Thesis no.AE-90-42 |
| Subject(s) | Rice--Research
Fertilizers and manures
|
| Note | A thesis submitted in partial fulfilment of the requirements of the degree of Master of Science, School of Environment, and Development |
| Publisher | Asian Institute of Technology |
| Abstract | 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..§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. |
| Year | 1990 |
| Type | Thesis |
| School | School of Environment, Resources, and Development |
| Department | Department of Food, Agriculture and Natural Resources (Former title: Department of Food Agriculture, and BioResources (DFAB)) |
| Academic Program/FoS | Agricultural and Food Engineering (AE) |
| Chairperson(s) | Upasena, Selawa H.; |
| Examination Committee(s) | Gartner, Joseph A. ;Sumitra Poovarodom,; |
| Scholarship Donor(s) | International Development Research Centre, Canada; |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 1990 |
