EVALUASI USAHA TUMPANG SARI EMPANG PARIT DI RPH CEMARA, BKPH INDRAMAYU, KPH INDRAMAYU

Hartina, Dr.Ir. Moch. Sambas Sn., M.Sc

1996 | Tesis | S2 Ilmu Kehutanan

Ekosistem mangrove mempunyai peranan penting, baik ditinjau dari segi ekologi maupun ekonomi. Namun saat ini keberadaan kawasan mangrove mulai terdesak dan mengalami degradasi akibat pertambahan penduduk dan kebutuhan lahan oleh sektor lain, terutama untuk pertambakan udang. Salah satu cara yang dipandang efisien dalam rehabilisasi mangrove adalah dengan pola empang parit. Tetapi empang ini hanya dapat menghasilkan produk perikanan dalam jumlah terbatas sehingga peningkatan kesejahteraan petani tambak tidak terlalu besar. Penelitian ini dilakukan di lokasi tumpang sari empang parit di RPH Cemara, BKPH Indramayu, Jawa Barat, bertujuan untuk mengkaji faktor-faktor yang berpengaruh terhadap keberhasilan penanaman mangrove dan produktivitas akuakultur pola empang parit. Hasil kajian ini diharapkan dapat digunakan untuk mencari kemungkinan-kemungkinan pengembangan lebih lanjut pola empang parit yang ada, guna meningkatkan keberhasilan penanaman mangrove dan produktivitas akuakultur. Analisis statistik dengan menggunakan proses pemilihan mundur (the backward elimination procedure), diperoleh hasil sbb.: r-.. .lJ_ = 356,3168 - 2,2224X3 + 8,8749X6 - 33,7480X10 + 13,5417X12 "Y2 = 1000 X (53,2830 + 13,6415X7 + 894,4139 X8 - 6,9272 X9)di1ana : Y1= persen tu.bub tana1an 1angrove, Y2== produktivitas akuakultur, x3 == tingkat keberhasilan sela1a 1engelola parit, x6== lebar parit, x7= kedala1an parit, x8 = luas lahan e1pang parit yang dikelola, x9 = persen parit ternaung, x 10 = nilai pH tanah te1pat tUlbuh tanatan 1angrove, diukur dala1 H2o, x12 = nilai pH tanah te1pat tu.bub tanaaan 1angrove, diukur dalat H2o2• Penilaian tumpang sari empang parit sebagai suatu bentuk agroforestry (silvofishery) dapat dilakukan melalui kriteria produktivitas, sustainabilitas (berkelanjutan /lestari), adoptabili tas ( terpakai). Berdasarkan hasil penelitian, dapat disimpulkan bahwa usaha tumpang sari empang parit di RPH Cemara termasuk rancangan agroforestry yang baik kalau dinilai menurut kriteria produktivitas dan adoptabilitas, namun memiliki kelemahan dalam keles

Mangrove ecosystem has important role ecologically as well as economically. At present, however, mangrove area is at its disavantage level, it is degraded due to population pressure and demand of land by the other sector especially shrimp culture. One way for rehabilitating mangrove area which is considered efficient is through silvofishery practice by estabilishment of ditch pond in mangrove area. Although the expected fishery produce is somewhat limited. So that it yields only low income improvement for fishery farmer. The study was done in silvofishery area of RPH Cemara, BKPH Indramayu, KPH Indramayu, West Java with objective of determining factor(s) affecting the succes of mangrove planting and productivity of ditch pond aquaculture superimposed in mangrove area. It is expected that results of the study could be usefull for formulating new development of dictch pond silvofishery system in mangrove area, so that a succesfull mangrove tree planting and high aquaculture production could be materialized. Regression analysis using backward elimination procedure was adopted to select model of best fit. It turn out ?e following equation : Xi= 356,3168 - 2,2224X3 + 8,8749X6 - 33,7480X 10 + 13,5417X12 'Y2 = 1000 X (53,2830 + 13,6415X7 + 894,4139 x 8 - 6,9272 X 9 ) Where : Y1 = survival rate of 1angrove planting, Y 2 = productivity of aquaculture, x 3 = successing rate in 1anaging ditch pond, x 6 = ditch pond width, x 7 = ditch pond depth, X a = area of forest-fishery culture, x 9 = shading rate of ditch pond, x 10 = pH of 1angrove habitat measured as pH H;P, x 12 = pH of 1angrove habitat 1easured as pH H 2 o 2 • Evaluation of ditch pond fishery as a form of agroforestry (silvofishery) may usually be based on productivity, sustainability, adoptability. Based on the result of the study, it can be concluded that ditch pond silvofishery system in RPH Cemara was a good practice of agroforestry based on its productivity and adoptability, however some weakness on sustainability was observed.

Kata Kunci : Ilmu Kehutanan,Tumpangsari Empang Parit,Hutan Mangrove (Bakau)