Naskah diterima tanggal 19 Agustus 2014 dan disetujui untuk diterbitkan tanggal 5 Januari 2015 ABSTRAK. Perbanyakan tanaman tin pada umumnya dilakukan dengan setek batang. Penanaman setek batang tanpa perlakuan menghasilkan persentasi jadi bibit yang relatif rendah sehingga diperlukan suatu perlakuan yang tepat pada setek sebagai sumber bibit yang dapat meningkatkan persentase jadi bibit. Penelitian bertujuan untuk mengetahui pengaruh jenis bahan alami dan asal setek batang terhadap pertumbuhan bibit tin. Penelitian dilakukan di Kebun Percobaan Berastagi dengan ketinggian tempat 1.340 m dpl. jenis tanah Andisol yang dilaksanakan dari bulan Juni sampai November 2011. Percobaan menggunakan rancangan acak kelompok (RAK) faktorial dengan dua ulangan. Sebagai faktor I adalah jenis bahan alami yang terdiri atas a 0 = air, a 1 = air kelapa 100%, a 2 = air kelapa 50%, a 3 = sari bawang merah 100%, a 4 = sari bawang merah 50%, dan a 5 = pembanding (Rootone-F 100 ppm), sedangkan faktor II adalah asal setek bibit yang terdiri atas i 1 = pangkal batang, i 2 = tengah batang, dan i 3 = ujung batang. Sumber bibit berasal dari satu pohon induk. Hasil penelitian menunjukkan bahwa tidak terdapat pengaruh nyata perlakuan asal setek batang pada setiap parameter yang diamati, tidak terdapat interaksi antara jenis bahan alami dan asal setek tanaman bibit tin. Jenis bahan alami air kelapa 50% menghasilkan waktu bertunas lebih cepat, panjang tunas, jumlah daun, panjang, dan bobot basah akar yang tinggi. Bahan alami air kelapa 50% dapat menggantikan perangsang akar sintetis sebagai zat pengatur tumbuh pada setek batang tin. Hasil dari penelitian akan bermanfaat dalam meningkatkan persentase jadi perbanyakan bibit tin melalui setek batang dengan menggunakan bahan alami sebagai perangsang tumbuh. Katakunci: Ficus carica L.; Air kelapa; Sari bawang merah; Asal setek bibit ABSTRACT. The propagation of fig generally done by stem cuttings. Planting cuttings without treatment resulted in a percentage the seeds are relatively low, so we need a proper treatment of the cuttings as a source of seeds, so the seeds can increase the percentage. The aimed of the research to find out the effect of growth natural hormones and stem cutting sources of fig seed growth. The research was conducted at Berastagi Experimental Farm with the altitude is 1,340 m asl., the soil type is Andisol, on June -November 2011.Factorial randomized block design was used with two replications. The first factor is natural materials: a 0 = water, a 1 = . coconut water 100%, a 2 = . coconut water 50%, a 3 = . shallot juice 100%, a 4 = shallot juice 50%, and a 5 = comparison (Rootone-F 100 ppm). The second factor is stem cutting origins : i 1 = stem base, i 2 = stem middle and i 3 = stem tip. The seed source from the one mother plant. The result showed that no found effect of stem cutting origin treatment of each parameter were observed, no found interaction between the type of natural materials and stem cutting origin of fig seedlings. Type of natural material coconut water 50% yi...
Penggunaan pupuk organik sebagai alternatif pengganti pupuk anorganik dapat mengurangi pencemaran lingkungan. Tujuan dari penelitian ini adalah mengetahui pengaruh jenis dan konsentrasi pupuk organik cair (POC) terhadap pertumbuhan dan hasil brokoli (Brassica oleracea). Penelitian dilaksanakan di IP2TP Berastagi pada bulan Mei sampai dengan September 2020. Penelitian menggunakan Rancangan Acak Kelompok (RAK) dengan 3 kali ulangan dan 10 perlakuan. Perlakuan yang diuji adalah sebagai berikut: A: tanpa POC (Kontrol), B: POC kotciplus 10 ml/L, C: POC kotciplus 20 ml/L D: POC kotciplus 30 ml/L, E: POC kipait 10 ml/L, F: POC kipait 20 ml/L, G: POC kipait 30 ml/L, H: POC limbah buah 10 ml/L, I: POC limbah buah 20 ml/L, J: POC limbah buah 30 ml/L. Hasil penelitian menunjukkan bahwa POC yang terbaik adalah POC kotciplus. POC kotciplus 20 ml/L, dan POC kotciplus 30 ml/L menunjukkan diameter kanopi terlebar yaitu masing-masing (52,35 cm dan 51,71 cm). Pemberian POC kotciplus 30 ml/L mampu meningkatkan hasil brokoli dilihat dari diameter bunga, bobot bunga per tanaman, bobot kuntum dan bobot bunga per plot.
Pollinating insects act as agents for transferring pollen to the pistil that leads to the increase of quality seed production. Since carrot is propagation through seed, insect pollination are important in the reproduction of the crop. The purpose of this study was to observe the diversity and activity of pollinating insects on carrot flowers in the Experimental Garden of the Agricultural Technology Research and Assessment Installation (IP2TP) Berastagi. Scan sampling method was applied to record the pollinator diversity, while the foraging behaviour of the insects was observed using focal sampling. The number of insects were recorded, collected and preserved in ethanol 70%. Insect identification guideline book was used to identify the insects by comparing their morphology and physiology. The results showed that there were 8 insect species visiting the carrot flowers: Amegilla sp., Polyrachis sp., Coccinella sp., Rhagonycha sp., Muscidae sp., Chrysomya sp., Nephrotoma sp. and Tabanus sp. Amegilla sp. was found to have the highest intensity visiting the carrot flowers (21.6 ± 10.06)% while the lowest was demonstrated by Polyrachis sp. (12.6 ± 4.12)%. Also, Amegilla sp. was recorded to be the most active insect (11.84 ± 1.46 seconds/flower) with the number of flowers visited was 5,06 ± 1,46 flowers/minute. Polyrachis sp. has been revealed to have the longest stay on the flowers visited (49.24 ± 3.89 seconds/flower) with the number of flowers visited 1.21 ± 3.90 flowers/minute. The diversity of pollinating insect was found to be in intermediate level (H’ = 1.89).
ABSTRAK. Ketersediaan varietas markisa unggul yang bermutu tinggi, produktif, tahan terhadap hama/penyakit dan toleran terhadap cekaman lingkungan merupakan salah satu faktor penting dalam peningkatan daya saing industri hortikultura nasional. Upaya untuk memperoleh varietas unggul dilakukan melalui silangan antaraksesi lokal yang memiliki karakter unggul. Tujuan penelitian ini adalah mengarakterisasi morfologi dan anatomi aksesi markisa lokal berkulit ungu, merah, dan markisa hasil silangan. Kegiatan dilaksanakan di Kebun Percobaan Berastagi mulai April 2014 sampai Juli 2014. Hasil analisis data diperoleh kemiripan morfologi markisa ungu dan markisa merah berdasarkan habitat, bunga, liana, teresterial, akar tunggang, batang dan arah tumbuh, sedangkan daun, bunga, buah, biji, dan warna batang berbeda. Berdasarkan karakter kuantitatif antara markisa F1 dengan markisa ungu memiliki kadar gula sama dengan markisa ungu lokal yakni 16,6 o Brix. Markisa F1 memiliki 73,06 ml/100 g dengan total asam 1,53%. Berdasarkan hasil analisis dendogram diketahui hubungan morfologi markisa menunjukkan tingkat kemiripan markisa lokal merah dan markisa F1 sebesar 81%. Markisa F1 memiliki buah besar, warna kulit ungu kemerahan, aroma sari buah mirip dengan aroma jambu biji.Kata kunci: Passiflora edulis f. edulis Sims; Karakter; Morfologi; Anatomi ABSTRACT. Availability of superior variety of passion fruits which high quality, resistant to pests or diseases, and tolerance to environmental stress are essential in improving the competitiveness of national horticultural industry. Superior varieties have been made through crossing local accessions that have superior characters. The aim of this experiment was to characterize the morphology and anatomy of purple passion, red passion, and F1 of passion fruit at Berastagi Experimental Farm from April 2014 to July 2014. Morphology and anatomy characterization obtained that purple passion fruit and red passion fruit had same characters based on habitat, flowers, lianas, terrestrial, taproot, stems, and direction of growth, whereas leaves, flowers, fruits, seeds, and stems color had different characters. Brix sugar level degrees between purple passion fruit and F1 almost similar, it was 16,6 o Brix, while the terms content juice of passion fruit cross F1 was 73,06 ml/100 g with total acid was 1,53%. Dendogram based on morphology characters of purple, red, and passion fruit cross F1 had 81% of similarity degree. Passion fruit cross F1 had a great size, reddish purple color, and guava aroma.
Sustainable agriculture emphasizes the use of botanical insecticides obtained from local plants to control cabbage leaf webber, Crocidolomia binotalis Zeller on cabbage plants. The objective of this study was to assess several species of plants for their ability in controlling this destructive pest. The research was conducted at Experimental Garden in Berastagi, from April to September 2017. It was designed using Randomized Block Design (RBD) non-Factorial consisting of 10 treatments with 3 (three) replications. The results revealed that the application of leaf crude extracts of thornapple (Datura metel) + tephrosia (Tephrosia vogelii) + galangal rhizome (Alpinia galanga) (1:1:1) at concentration 20% (E) was more effective in controlling this caterpillar compared to the use of chemical insecticides. The highest average of cabbage production was found in the plants treated with leaf crude extracts of thornapple + tephrosia + galangal rhizome (1:1:1) at concentration 10% (2.85 kg/plot).
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