The Relationship Between Physical and Chemical Properties in Poolae Pineapple With Maturity Stage Among Number 0 - 7

Abstract

This Research has objective to:  study the relationship between physical and chemical properties in Poolae pineapples with maturity stage among number 0 - 7change. And to find the right time to harvest maturity or ripen Poolae pineapples for market demand. And define as raw material specifications. Poolae pineapples sample harvested from farms in Tumbon Bandoo(Phuvaree Farm) and Tumbon Nanglae(Kume Pengme Farm) Amphure Muang  Chiangrai province. They selected with a shell color corresponding to maturity stage among number 0 – 7. The research found that : physical properties, Poolae pineapple shell color from both farms have all green in maturity stage number 0. When the maturity stage number increase has yellow increase respectively until maturity stage number 7 has all yellow. Poolae pineapple size(circumference and high) and weight from both farm have slightly increase when maturity stage number increase (p≥0.05). Poolae pineapple flesh color from both farm same change, L* value decrease significant (p<0.05)when maturity stage number increase, at the same time  a* and  b* value increase significant(p<0.05) when maturity stage number increase. Poolae pineapple firmness from both farms have reduce significant (p< 0.05)when maturity stage increase.  Chemical Properties of Poolae pineapple flesh : Total soluble solid and pH both farms have increase significant(p< 0.05) follow maturity stage number. Thus, Physical and Chemical Properties in Poolae Pineapple have relationship with maturity stage. This can lead to a harvest time and defined as the raw material specification of Poolae pineapple according to the need to take advantage.