Keragaman Pertumbuhan dan Heritabilitas Bibit Mahoni Daun Lebar Asal Kebun Benih Semai di Parung Panjang, Bogor (Growth variation and heritability of seedlings of Swietenia macrophylla on seedling seed orchard in Parung Panjang, Bogor)

Abstract

Swietenia macrophylla is an important timber producer in Indonesia. The purpose of this study was to determine the growth variation and heritability values of Swietenia macrophylla seedlings at 6 months of age from several families from the seedling seed orchard in Parung Panjang Special Purpose Forest Area (KHDTK), Bogor. The research design used was a completely randomized design (CRD) with family treatment. There were 28 families observed in this study, with each family consist of 16 individual plants (4 replications with 4 seedlings per replication). Analysis of variance showed that family had a significant effect on growth in height, stem diameter, and sturdiness quotient of 6 months old of S. macrophylla seedlings. The results of the Duncan test showed that the height of the separate seedlings in 10 groups was different with an average of 37.46 cm, the diameter of the separate stems in 9 groups was different with an average of 0.50 cm and the separate sturdiness quotient in the 12 groups was different with the mean amounting to 7.53. Individual heritability and family heritability of height, stem diameter and sturdiness quotient are included into high category.

Pertumbuhan Semai Pelita (Eucalyptus pellita) pada Berbagai Perlakuan Dosis Pupuk Dasar NPK dengan Sistem Hidroponik NFT

“…Bibit yang relatif tinggi dan kurus menunjukkan tingkat rasio tinggi, sedangkan bibit yang kokoh menunjukkan bahwa tingkat rasio rendah (Nurmin dan Sudrajat, 2019). Diameter batang lebih besar daripada tinggi bibit menunjukkan bahwa bibit semakin kokoh, hal tersebut sejalan dengan menurunnya nilai indeks kekokohan (Mashudi et al, 2016). Nilai indeks kekokohan yang tinggi menunjukkan ketidakseimbangan pertumbuhan tinggi dan diameter.…”