| Author | Sambrano, Marcelo A. |
| Call Number | AIT Thesis no. AE-87-44 |
| Subject(s) | Nitrogen fertilizers
|
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Abstract | Five levels or nitrogen fertilizer; 0 , 100, 200, 300, and
400 kg N/ha were applied to pure para grass stand in two equal
dressings. In another experiment, five levels or phosphorous; 0 ,
25, 50, 75, and 100 kg P/ ha were applied to para grass/phasey
bean mixture in single application. Concurrently with these
fertilizer trials was a five-month qualitative observation on the
growth characteristics or different species or forage.
Application or nitrogen fertilizer had resulted to
significant increase CP (0. 01) in dry matter yield and nitrogen
concentration in dry matter or para grass. The variability or
rainfall distribution during the experimental period caused
fluctuation on dry matter production and nitrogen recovery in
three different cutting schedules. The minimum N requirement or
draught animal was obtained at 200 kg N/ha during the month or
November and May. Persistent high dry matter yield with adequate
N concentration cannot be maintained throughout the year under
rain-fed forage production scheme, even high levels or nitrogen
is used. None or nitrogen- treated plots had satisfied the
minimum phosphorous requirement or draught animals.
Phosphorous . fertilizer had increased the P concentration in
dry matter or para grass but still inadequate to meet the minimum
requirement or draught animals. Both para grass and phasey beans
did not respond favorably to phosphorous application in terms or
dry matter yield.
Some forage species can be established from seeds in January
provided that adequate soil moisture, nitrogen and phosphorous
fertilizer be supplied at reasonable rates and at the proper
time. Promising grass species includes; Brachiaria decumbens, Panicum maximum, Setaria sphacelata, and Urochloa mosambicensis. Centrosema pascuorum and Stylosanthes hamata were identified as
potential legume introductions. |
| Year | 1987 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Agricultural and Food Engineering (AE) |
| Chairperson(s) | Gartner, Joseph A. |
| Examination Committee(s) | Nielsen, Jens Moller ;Peacock, Christabel P.
|
| Scholarship Donor(s) | Food and Agriculture Organization |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 1987 |