KOMPOSISI DAN STRUKTUR KOMUNITAS TUMBUHAN BAWAH DI HUTAN JATI KPH NGAWI PERUM PERHUTANI UNIT II JAWA TIMUR

GUNAWAN SAFA'AT, Ir. Soewarno Hasanbahri, MS.

2010 | Skripsi | S1 KEHUTANAN

ekosistem. Tumbuhan Namun bawah dalam praktek memiliki peran pengelolaan yang hutan cukup tanarnan penting jati, dalam turnbuhansuatu bawah selalu dilihat dari sisi negatifnya saja. Penelitian ini bertujuan untuk turnbuhan mengetahui bawah, kornposisi, serta untuk struktur mengetahui komunitas, keserupaan kelimpahan, dan komposisi pola tumbuhansebaran bawah di bawah tegakan jati. Dengan an dalam mengetahui pengelolaan peran hutan tumbuhan jati sebagaibawah, salah diharapkan satu faktor dapat penentu menjadi produktivitas.pertimbang Pengumpulan data di lapangan menggunakan plot berukuran 20 m x 100 m. Dalarn plot ini terdapat sub-plot dengan ukuran 10 m x 10 m sebanyak 20 buah sub-plot digunakan ukuran 10 untuk x 10 m mengambil tersebut, data pohon terdapat yang petak berada ukur dalarn 2 m x plot. 2 Di rn dalamyang digunakan untuk mengambil data tumbuhan bawah. Data yang diperoleh kemudian bawahnya. dicari Untuk indeks rnengetahui nilai pola pentingnya sebarannya, untuk mengetahui digunakan analisis kelimpahan varians-meantumbuhan ratio koefisien dan untuk komunitas mengetahui Sorrenson. nilai keserupaan komposisi, digunakan rumus famili yang Dari hasil diketahui. penelitian Pada petak diperoleh 81 jenis 55 jenis turnbuhan tumbuhan bawah bawah yang dan dominan terdapat adalah23

Undergrowth plants have an important role in an ecosystem. However, in practice the management of teak plantations, the undergrowth plants are always viewed from the negative side. This study aims to determine the composition, community structure, abundance, and distribution patterns of undergrowth plants species, and to detect similarities in the composition of undergrowth plants under stands of teak. By knowing the role of undergrowth plants, are expected to be a consideration in the management of teak forests as one key factor productivity. Data collection in the field using a plot measuring 20 rnx 100 m. In this plot there is a sub-plot with a size of 10 m x 10 m by 20 sub-plot are used to retrieve trees data residing in the plot. In the sub-plot size 10 x 10 m, there are plots of 2 m x 2 m which is used to retrieve undergrowth plants data. The data obtained then search the importance value index to know the abundance of undergrowth plants. To know the distribution pattern, used analysis of variance­mean ratio and to determine the similarity of the composition, use the formula coefficient Sorrenson community. The results were obtained under the 55 kinds of plants and there are 23 families are known. On 81 plots, the dominant undergrowth plants species are Croton tiglium Linn (22.35%). At 17 A plot the dominant undergrowth plants is Sida acuta Bum. (41.48%). On the 21D plot the dominant undergrowth plants is Sida acuta Bum. (48.75%). At 45A plot the dominant undergrowth plants is Cyperus rotundus L. (130.22%). At 52A plot the dominant undergrowth plants is Leucaena leucoceplzala (CML) De Wit. (29.09%). On 48C plot the dominant undergrowth plants is Cyperus rotundus L. (34.46%). There are two patterns of dispersal in the location of the study, the distribution pattern are regular distribution pattern and random distribution pattern. From all observations plot, plot 81 and plot 17 A has the most similar ecological character that is equal to 63 .16%. While the plot of plots 81 and 45A have the smallest value of similarity of composition, which is 21.62%.

Kata Kunci : composition, structure, undergrowth plant,