PENGARUH FREKUENSI PENGAIRAN TERHADAP PERTUMBUHAN, PRODUKSI DAN KECERNAAN IN VITRO RUMPUT SUDAN (Sorghum sudanense) YANG DITANAM DI TANAH PASIR

Wati, Evy Sulistya, Ir. Bambang Suhartanto, DEA

2009 | Skripsi | S1 ILMU DAN INDUSTRI PETERNAKAN

PRODUKSI DAN KECERNAAN IN VITRO RUMPUT SUDAN (Sorghum sudanense) YANG DITANAM DI TANAH PASIR Evy Sulistya Wati 2003/ 167620/ PT/ 04549 INTISARI Penelitian ini bertujuan untuk mengetahui pengaruh frekuensi pengairan terhadap pertumbuhan, produksi dan kecernaan in vitro rumput sudan (Sorghum sudanense) yang ditanam di tanah pasir. Penelitian ini dilaksanakan pada tanah pasir di rumah plastik KP4 UGM Kalitirto, Berbah, Sleman, Yogyakarta. Lahan seluas 9,1 m2 dibagi 3 perlakuan frekuensi pengairan 2 hari sekali, 4 hari sekali dan 6 hari sekali. Data yang diambil adalah kebutuhan air, pertumbuhan (tinggi tanaman, lebar daun dan jumlah anakan), produksi bahan kering (BK), bahan organik (BO) dan protein kasar (PK) serta kecernaan in vitro bahan kering (BK) dan bahan organik (BO). Pemanenan dilakukan setelah tanaman berumur 84 hari. Data dianalisis variansi pola searah apabila terdapat perbedaan yang nyata dilanjutkan dengan uji Duncan’s multiple range test (DMRT). Hasil penelitian menunjukkan perbedaan yang nyata (P<0,05) antara frekuensi 2, 4, dan 6 terhadap kebutuhan air yaitu 536,5 ml/ hari, 301,5 ml/ hari, dan 206,7 ml/ hari, pertumbuhan tinggi tanaman 16,3 cm/ minggu, 11,3 cm/ minggu dan 7,8 cm/ minggu, lebar daun 3,6 cm, 3,5 cm, 3,1 cm, jumlah anakan 14,8 anakan/ minggu, 8,6 anakan/ minggu, dan 7,8 anakan/ minggu, produksi BK 66,90 g/ tanaman, 24,55 g/ tanaman dan 12,82 g/ tanaman, produksi BO 59,91 g/ tanaman, 22,07 g/ tanaman dan 11,59 g/ tanaman, produksi PK 4,92 g/ tanaman, 2,11 g/ tanaman, dan 1,12 g/ tanaman, tetapi antara frekuensi 2, 4, dan 6 berpengaruh tidak nyata terhadap kecernaan in vitro BK dan BO yaitu 45,87%, 44,79% dan 44,46% dan 44,90%, 45,94% dan 47,13%. Berdasarkan hasil penelitian dapat disimpulkan bahwa tanaman rumput sudan yang ditanam di tanah pasir frekuensi pengairan 2 hari sekali berpengaruh terhadap pertumbuhan dan produksi (BK, BO dan PK), tetapi kecernaan in vitro BK dan BO tidak dipengaruhi oleh frekuensi pengairan. Kata kunci: Air, Frekuensi pengairan, Pertumbuhan, Produksi, Kecernaan in vitro, Rumput Sudan, Tanah pasir.

THE EFFECT OF WATERING FREQUENCY ON THE GROWTH, PRODUCTION, AND IN VITRO DIGESTIBILITY OF SUDAN GRASS (Sorghum sudanense) PLANTED IN SANDY LAND Evy Sulistya Wati 2003/ 167620/ PT/ 04549 ABSTRACT This research was aimed to determine the effects of watering frequency on the growth, production, and in vitro digestibility of sudan grass (Sorghum sudanense) planted in sandy land. This research was done on sandy land in a modified green house belong to KP4 UGM, Kalitirto, Berbah, Sleman, Yogyakarta. The area of 9.1 m2 was divided into 3 plants to place sudan grass for watering frequency treatments: every two days, every four days, and every six days. Data collected were: water quantity, growth (plant’s height, leaves width and number of tiller), production of dry matter (DM), organic matter (OM) and crude protein (CP), and in vitro DM and OM digestibility. The plants were harvested after 84 days (12 week) of age. Data were analyzed using analysis of variance from one way experimental design, and continued by Duncan’s new multiple range test (DMRT) when a significant differences was detected. The results showed that there were significant differences among level 2, 4 and 6, that were water quantity (536.5 ml/ day, 301.5 ml/ day, and 206.7 ml/day), growth plant’s height (16.3 cm/ week, 11.3 cm/ week, and 7.8 cm/ week), leaves width (3.6 cm, 3.5 cm, and 3.1 cm), number of tiller (14.8 tiller/ week, 8.6 tiller/ week and 7.8 tiller/ week), DM production (66.90 g/ plant, 24.55 g/ plant and 12.82 g/ plant), OM (59.91g/ plant, 22.07g/ plant and 11.59 g/ plant), and CP production (4.92 g/ plant, 2.11g/ plant and 1.12 g/ plant). However there were no significant differences among level 2, 4 and 6 in vitro DM digestibility (45.87%, 45.69% and 44.79%) and OM digestibility (44.90%, 45.94% and 47.13%). Based on results, it can be concluded that watering plants every 2 days increased growth and production (DM, OM, and CP) of sudan grass, but the in vitro DM and OM digestibility were not effect by watering frequency. Key words: Water, Watering frequency, Growth, Production, In Vitro digestibility, Sudan Grass (Sorghum sudanense), Sandy land.

Kata Kunci : Air, Frekuensi pengairan, Pertumbuhan, Produksi, Kecernaan in vitro, Rumput Sudan, Tanah pasir