Quantity :1



Title: Effectiveness of calcium fertilizers on calcium content in mango (Mangifera indica, L.) grown on calcareous soil

Author : Mohd. Razi Bin Md. Noor

A field experiment was conducted to evaluate the effect of calcium fertilizers and irrigation on calcium content in mango (Mangifera indica L.) and the incidence of insidious fruit rot (IFR) grown on alkaline soil, which were also characterized according to the Malaysian Department of Agriculture Fertility Classification Systems, before the treatments were conducted. Two rates of irrigation (without irrigation (T) and with irrigation (A)) and three sources of Ca fertilizers (no Ca fertilizer (CO), Ca(NO3) (subscript 2) fertilizer (CN), and Biomin Ca fertilizer (CF)) factorial experiment were arranged in a Randomized Complete Block Design with four replications. Characterization of alkaline soils (Bukit Bintang Moderately Deep (BBD) and Bukit Bintang Shallow (BBC)) showed that the soils were loamy with clay content between 18-35 percent and 30 percent silt. The infiltration rate was low (0.14-1.30 cm hr superscript -1). The soil pH was between 7.23-8.40 and the carbonate content was more than 50 g kg (superscript -1). The effective depth more as follows BBS, 50-100 cm; BBD > 100 cm and BBC<50 cm. Soil suitability classes for BBS was 3t (cd); BBD, 3t (d); and BBC, 5cR (tdO). Soil fertility capability classes for BBS and BBD were Ldb and BBC was L'L"db. The BBS and BBD soils were suitable for most of the crops while BBC was limited to shallow rooted crops. Sources of Ca fertilizers and irrigation did not influence the nitrogen and potassium contents in the mango leaf tissue. However, the Ca content increased with CN (22.89-31.51 g kg (superscript -1)) and CF (23.06-30.20 g kg (superscript -1)) applications. Although CN increased the Ca content in mango leaves tissues, the N/Ca ratio also increased. On the other hand, CF treatment lowered the N/Ca ratio (<0.5). percent Calcium nitrate was more effective in increasing the Ca content in leaves tissue while Biomin Ca was more effective in decreasing the N/Ca ratio, also in the leaves tissue. Result of various sources of Ca fertilizer and irrigation, CF fertilizer application with or without irrigation, reduced the IFR incidence (18.75-27.08 percent) in mango and increased the marketable fruits by more than 90 percent of the total fruit yield. IFR incidence increased with the decrease in Ca content and increase in N/Ca and K/Ca ratios in mango leaves. The critical level of Ca content in the leaf was >30.84 g kg (superscript -1) and 0.47 for N/Ca and 0.24 K.Ca ratio. IFR incidence was also correlated with N, K, Ca concentrations, and N/Ca and K/Ca ratios in mango fruit tissue. The critical level of nutrients in mango fruits was 6.10 g kg (superscript -1) N, 5.20 g kg (superscript -1) and 0.72 g kg (superscript -1) Ca, 9.90 N/Ca, and 8.20 K/Ca.

Subject:

soil science calcium fertilizers mango Mangifera indica calcareous soil irrigation

Material : theses

Publisher : Universiti Pertanian Malaysia,

Publication Date : January 1996

PR-T

1996

T - SoSc 17

SEARCA Library

TD

Tags (theses)


 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

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