Soil nitrogen and phosphorus and tea leaf growth in organic and conventional farming of selected fields at Sabah Tea Plantation slopes

Ho, Teck Yung (2007) Soil nitrogen and phosphorus and tea leaf growth in organic and conventional farming of selected fields at Sabah Tea Plantation slopes. Universiti Malaysia Sabah. (Unpublished)


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Tea has become one of the most popular drinks due to its pharmacological properties. However, tea plants absorb its essential nutrients mainly from soils for growth and development. Thus, this study was done at two selected fields; B29 (conventional field) and NO3 (organic field) in Sabah Tea Plantation (STP) to study the effects of farming system and slope section on nitrogen, phosphorus, soil pH and leaf growth. Slope in each field was divided into three sections; top, middle and low. About 18 soil replicates and 108 tea leaves were sampled from both slopes in the two fields. The concentration of ammonium, nitrate and phosphorus in soil samples were analyzed using Indophenol Blue method, Salicylic Acid method and Mehlich-3 test, respectively. Soil pH was measured using pH meter with soil-water ratio of 1:2.5. Leaf measurement was done manually using ruler. The effects of the two factors on six parameters were analyzed with SPSS software version 12.0 using two-way ANOVA and Post Hoc Turkey test. Results showed that organic farming system (OFS) produced higher soil pH (4.14), leaf length (15.14 cm) and leaf width (7.33 cm) than conventional farming system (CFS) (soil pH - 3.38; leaf length - 13.19 cm; and leaf width - 5.58 cm). However, CFS produced higher levels of ammonium content (166.l6 μg ml�¹) than OFS (22.56 μg ml�¹). No significant difference in soil phosphorus and nitrate content were observed between the two farming systems. Results also showed no significant effects of slope levels on all parameters studied. The study shows that OFS not only improve tea leaf growth but also the pH level of soil, suggesting that OFS is a better farming system to be practiced in tea production.

Item Type: Academic Exercise
Uncontrolled Keywords: tea, soil, Indophenol Blue method, organic farming system, Post Hoc Turkey test, ANOVA, conventional farming system, nitrogen, phosphorus
Subjects: Q Science > QK Botany
Divisions: SCHOOL > School of Science and Technology
Date Deposited: 19 May 2014 01:57
Last Modified: 13 Oct 2017 02:45

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