Effect of mode of site preparation and introduction of inoculated and uninoculated Leucaena leucocephala (LAM.) de Witt. on the regrowth of Imperata cylindrica (L.) Beauv.

Date

5-1982

Degree

Bachelor of Science in Biology

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Percy E. Sajise

Abstract

A field study was conducted at a selected cogon grass-land at the UPLB Hydroscology Site at Puting Lupa, Columba, Laguna to investigate the effect of mode of site preparation and introduCtion of inoculated and uninoculated ipil-ipil on the regrowth of cogon. Agronomic characters, such as total dry weight, density and height for cogon; and total dry weight, height and stem diameter for ipil-ipil were measured at all "our harvest periods, The ipil-ipil shoots and roots wore also analyzed . for total nitrogen by the modified kjeldahl analysis at the end of the fourth harvest period. Results of the agronomic characters showed that cogon regrowth was better slowed down in the roundup herbicide-prepared sites than those with cogon grasses that were lodged

or rolled over. lilting, however, compared favorably with the herbicide application in terms of the above agronomic characters. cost analysis of roundup application compared with lodging indicated that herbicide application is much more expensive than lodging, as a mode of site preparation. The synergistic effect of the double symbiosis of mycorrhizal fungi and Rhizobium did not significantly ex-press itself in the increased competitive ability of ipil-ipil as a reforestation species in the natural field conditions. Prior to field transplantation, however, results (in terms of the ipil-ipil stem diameter, height and gross appearance) of ipil-ipil doubly inoculated with Rhizobium and mycorrhizal fungi showed better growth than the uninoculated ones.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

Thesis

Document Type

Thesis

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