PENGARUH NAUNGAN TERHADAP PROSES EKOFISIOLOGI DAN PERTUMBUHAN SEMAI Shorea selanica (DC.) Blume DI PERSEMAIAN

Abstract

Shorea selanica is one promising meranti species for commercial plantation, forest rehabilitation and reforestation purposes. Caused optimum light intensity for the seedling at nursery is unknown, the research effect some shading intensity on the seedling growth is necessary to be done. This research used completely randomized design of 4 treatments are : N0 = no shading (0%), N1 = shading intensity 55%, N2 = shading intensity 65% and N3 = shading intensity 75%. Each two seedling of S. selanica planted at mini plot (60 cm x 100 cm size) that closed with shading net above them. Each treatment consist 3 replication. The parameter are height and stem diameter, sum of leaf, rate of photosynthesis rapid, fresh and dry weight. Measurement was carried out in each one week, except for fresh and dry weight just carried at the end of this research (six week after planting). This results showed that application with shading intensity 65% gave the best influence for S. selanica seedling growth. The effect is very significant for height and diameter growth, fresh weight and dry weight of S. selanica seedling, with each average are 10,85 cm; 1,113 mm; 12,558 g and 3,463 g. Application sgading intensity 75% showed bad effect for seedling growth, less than no shading application or shading intensity 55%. Its suggested that S. selanica seedling were more tolerant with full sunlight and under storey condition with light intensity about 35%, but light intensity less than 35% will make their growth become slowly.

Diameter growth performance and estimated carbon stock of Shorea spp. at KHDTK Haurbentes, Bogor

“…Furthermore, based on the results of the normality test, the species S. leprosula and S. selanica are able to adapt well to the rehabilitation plot of unproductive forest stands. It is in accordance with research conducted by Fajri (2020) and (Panjaitan et al 2011), which stated that S. leprosula and S. selanica could adapt well to rehabilitation land, such as unproductive forest stands. Moreover, according to research which had conducted by Pamoengkas and Prasetia (2014), at a young age, the type of S. leprosula has not been able to grow well; however, when it reaches the age of 3 years and over, the growth of this plant is able to adapt to its environment well.…”

Pengaruh Media Tanam dan Nutrisi Terhadap Pertumbuhan Kentang Hitam (Plectranthus rotundifolius) Selama Aklimatisasi

“…Pada saat pelaksanaan penelitian pada musim penghujan, dimana matahari tidak sepenuhnya muncul. Tanaman yang tumbuh pada intensitas cahaya yang rendah menunjukkan luas daun yang lebih besar namun ketebalannya tipis dan juga sebaliknya (Panjaitan et al, 2011). Penggunaan media tanam yang berbeda memberikan pengaruh yang tidak nyata terhadap karakteristik pertumbuhan seperti tinggi tanaman, diameter batang, dan jumlah daun (Tabel 2).…”

PERLAKUAN NAUNGAN DAN PEMBERIAN NaCl UNTUK MENGHAMBAT PERTUMBUHAN BATANG BAWAH KARET (HEVEA BRASILIENSIS MUELL ARG.)

“…Hasil tersebut sejalan pada tanaman Agathis loranthifolia, dimana perlakuan naungan lebih menekan pertumbuhan tinggi tanaman dibandingkan perlakuan NaCl saja (Satjapradja et al, 2006). Perlakuan naungan berat (lebih dari 75%) juga menghambat pertumbuhan tunas pada tanaman Shorea selanica, mencapai 59% lebih rendah dibandingkan kontrol tanpa naungan (Panjaitan, Wahyuningtyas, & Ambarwati, 2011).…”