Sap nitrate in relation to tissue nitrogen and yield of 'queen' pineaaple under different fertilizers levels
Date
10-1998
Degree
Bachelor of Science in Agriculture
Major Course
Major in Horticulture
College
College of Agriculture and Food Science (CAFS)
Adviser/Committee Chair
Domingo E. Angeles
Abstract
The relationship between the following were determined: sap and tissue nitrate levels; total N with sap and tissue nitrate; and total nitrogen with yield; and the influence of the different fertilization programs on the sap and tissue nitrate and total nitrogen in the leaf of 'Queen' pineapple. The fertilization programs used were current Farmer's practice (treatment 1), PCARRD's recommendation (treatment 2) and Commercial practice (treatment 3). Sap nitrate-N was determined by Merck test strips and read in a Nitrachek, a portable reflectometer.
Sap nitrate-N increased with increasing rate of fertilization and was highest at 149.36 ppm under the Commercial fertilizer rate and lowest at 81.81 ppm under Farmer's practice. Increasing rate of nitrogen fertilization also increased tissue nitrate and total N. High correlation coefficients between sap nitrate-N and tissue nitrate (r = 0.97) and sap nitrate-N and total N (r =0.96) were obtained. Sap nitrate-N values determined using the Merck test strips were also highly correlated (r = 0.96) with portable reflectometer readings.
Fruit size also increased with fertilizer rate. Sap nitrate-N, tissue nitrate and total N at highest yield were 149.36 ppm, 1013.72 ppm, and 0.88%, respectively.
Language
English
Location
UPLB Main Library Special Collections Section (USCS)
Call Number
Thesis
Recommended Citation
Azucena, Millicent Lourdes A., "Sap nitrate in relation to tissue nitrogen and yield of 'queen' pineaaple under different fertilizers levels" (1998). Undergraduate Theses. 10286.
https://www.ukdr.uplb.edu.ph/etd-undergrad/10286
Document Type
Thesis