PENGARUH PUPUK N, P, K DAN Mg TERHADAP PERTUMBUHAN DAN KUALITAS LIDAH BUAYA (Aloe vera chinensis) PADA LAHAN GAMBUT INDRAGIRI HILIR RIAU

The objective of this research was to study the effect of N, P, K and Mg fertilizers on growth and quality of <em>Aloe vera</em> chinensis in peat soil of Indragiri Hilir Riau. The research was conducted at PT Bhumireksa Nusasejati Plantation, Indragiri Hilir Riau. The research was arranged by Factorial Randomized Block Design with 4 factors, 4 levels, 3 replications. The first factor was N dosage fertilizer (N0=0g, N1=5g, N2=10g, N3=20g N/plant/month), The second factor was P dosage fertilizer (P0=0g, P1=4g, P2=8g, P3=16g P₂O₅/plant/month), The third factor was K dosage fertilizer (K0=0g, K1=7.5g, K2=15g, K3=30g K₂O/plant/month), The fourth factor was Mg dosage fertilizer (Mg0=0g, Mg1=2.5g, Mg2=5g, Mg3=10g MgO/plant/month). The results showed that the application of N, K and Mg dosage significantly increased plant height, leaf length, leaf width, leaf thickness, and the number of leaf by quadratic response. Combination of N and P fertilizer significantly raised the leaf fresh weight. The complete treatment (NPKMg) and single factor either N and Mg did not increase the total chlorophyll and protein content , in contrast, P and K as a single factor significantly increased the total chlorophyll but not protein content. Gel of <em>Aloe vera</em> consisted of 17 essential amino acid