Update Artikelilmiah: 20893

FARIS JULDA PRADIPTA

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Abstrak (Bhs. Indonesia)

Penelitian bertujuan untuk : 1)	mengkaji perbedaan produksi kopi Robusta dari tanaman hasil perbanyakan vegetatif dan generatif di Kabupaten Purbalingga, 2) mengkaji pengaruh elevasi terhadap hasil kopi Robusta perkebunan rakyat di Kabupaten Purbalingga meliputi Kecamatan Kutasari elevasi 400 m dpl, Karangjambu elevasi 600 m dpl, dan Karangreja elevasi 800 m dpl, dan 3) mengkaji pengaruh kombinasi antara perbedaan elevasi dan hasil perbanyakan terhadap hasil tanaman kopi Robusta di Kabupaten Purbalingga. Penelitian ini dilakukan menggunakan metode survei agronomik dengan rancangan purposive random sampling menggunakan 2 faktor. Faktor pertama yaitu elevasi dan faktor kedua tanaman hasil perbanyakan vegetatif dan generatif. Sampel pada penelitian ini memiliki 3 kriteria ketinggian tempat, terdiri atas 10 sampel tanaman hasil perbanyakan vegetatif dan 10 dari tanaman generatif. Jumlah keseluruhan sampel yaitu 60 sampel. Varibel yang diamati berupa bobot buah segar, bobot buah kopi kering, cabang produktif, jumlah tandan, bobot tandan, bobot 100 biji segar, dan bobot 100 biji kering. Data dianalisis dengan analisis ragam tersarang. Jika berbeda nyata dilanjutkan uji beda nyata terkecil (BNT). Hasil penelitian menunjukan tanaman hasil perbanyakan vegetatif memberikan produksi bobot kopi kering lebih tinggi (1,585 kg) dibandingkan dengan tanaman hasil perbanyakan generatif  (0,231 kg). Elevasi yang memberikan produksi bobot  kopi kering terbaik pada elevasi 600 m dpl  sebesar 1,166 kg diikuti elevasi 800 m dpl sebesar 0,329 kg dan elevasi 400 m dpl sebesar 0,321 kg. Tanaman hasil perbanyakan vegetatif berproduksi paling tinggi di seluruh elevasi. Produksi terbaik pada strata 600 m dpl.

Abtrak (Bhs. Inggris)

The research aims to: 1) examine the difference of Robusta coffee production from vegetative (grafting) and generative method plant breeding in Purbalingga District; 2) to examine the effect of elevation on Robusta coffee plantation in Purbalingga District covering Kutasari Subdistrict with 400 m asl elevation, Karangjambu elevation 600 m asl and the Karangreja elevation of 800 m asl, and 3) studied the effect of a combination of elevation differences and the method of plant breeding of Robusta coffee plant Purbalingga District. This research was conducted using agronomic survey method with purposive random sampling design using 2 factors. The first factor is the elevation and the second factor of vegetative and generative plant breeding methods. The sample in this research has 3 elevation criteria, consisting of 10 plant samples of vegetative plant breeding method and 10 from generative plant breeding method. The total sample is 60 samples. The variables observed were fresh fruit weight, dry fruit coffee weight, productive branch, amount of bunches, weight of bunches, weight of 100 fresh seeds, and weight of 100 dry seeds. the data were analyzed by nested  analysis of varians design. If there a significant diffrence then followed by Least Significant Different Test (LSD). The results showed vegetative plant breeding method provide the yield of dried coffee weight higher (1,585 kg) compared to generative plant breeding method (0.231 kg). Elevation which gives the best yield of dried coffee weight at an elevation of 600 m above sea level of 1,166 kg followed by elevation of 800 m above sea level elevation of 0.329 kg and 400 m of 0.321 kg. Crop yields the highest production of vegetative plant breeding method throughout the elevation. The best production at 600 m above sea level.

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