Main nursery is the first step affecting oil palm's age and productivity. Good plant growth will produce high quality and yield of oil palm. 00, 12.59, 37.58, 56.41, 36.74, 87.00, 86.60, and 72.97 00, 12.59, 37.58, 56.41, 36.74, 87.00, 86.60, dan 72.97 g per bibit. Kata kunci: klorofil, neraca hara, rekomendasi pemupukan, respon morfologi dan fisiologi

Bioherbicides become one of the alternative eco-friendly weed controls that could be used. Saliara (Lantana camara) is one of the dominant weeds in oil palm plantations, this weeds have a distinctive aroma and contain allelochemical compounds. To further optimize weed control, soil processing is also considered a preventive method. This is because the soil treatment could cut the weed seeds so that it fails to germinate. The use of bioherbicide and soil treatment is expected to become the alternative weed control alternative that is more effective in controlling weeds by pre-growing. The objectives of this experiment were to obtain the alternative material for pre-emergence bioherbicide and to know the effectivity of soil tillage for controlling weed in oil palm plantation. This research conducted at Teaching Farm 2 and Biology Laboratory of Citra Widya Education Oil Palm Polytechnic Bekasi, from April until Mei 2017. This research was arranged in a factorial random block design with two replications. The first factor was soil tillage, consist of A1 (without soil tillage) and A2 (soil tillage). Second factor was bioherbicide application, consist of B1 (with bioherbicide application) and B2 (without bioherbicide application). Each of treatments repeated two times, so that there were 8 experimental unit. The data was analysis of variance. If the analysis variance test result was significant at 5%, then it continued by T test (Least Significance Different, LSD). The result showed that Lantana camara could be as alternative material for pre-emergence bioherbicide in oil palm plantation. Soil tillage and application of Lantana camara bioherbicide not significantly affected to height weeds, number of leave and biomass. The interaction between these factors significantly affected to number of leaves in 2 weeks. The best combination treatment was without soil tillage and application of bioherbicide.

Dayak shallot has various phytochemical compounds that useful for health; people use it as medicinal plants. The technique of cultivating plants has not been informed completely. Hence, the research needs to be conducted to understand the competitiveness of weeds and the best planting space for optimal production. The research objectives are to obtain the effect of weed control and plant spacing for Dayak shallot growth and development. This research was used <em>randomized block design</em> two factors. The first factor is plant spacing and the second factor is weed control. There are four combinations of treatments between planting space and weed control. The treatment combinations used are: (1) Plant spacing of 15 cm x 15 cm with weed control; (2) Plant spacing of 15 cm x 15 cm without weed control; (3) Plant spacing of 30 cm x 30 cm with weed control; and (4) Plant spacing of 30 cm x 30 cm without weed control. Each treatment combination was repeated three times. The results showed that a combination of plant spacing and weed control was affected the percentage of flowering, the number of flowers on 4 and 6 days after planting, and the dry weight of Dayak shallot. The components of plant growth of Dayak shallot (plant height, number of leaves, root length, leaf biomass, root biomass, and total flavonoid content) was not affected by the combination of treatments. The dominant weed is <em>Borreria latifolia,</em> with SDR 30.623%.

ABSTRAKKeberadaan gulma di areal budidaya tanaman dapat memengaruhi pertumbuhan dan perkembangan tanaman utama, begitu juga pada tanaman kelapa sawit. Pemanfaatan bioherbisida dari limbah gulma saliara dapat menjadi metode alternatif untuk mengendalikan gulma tanpa merusak lingkungan, serta meningkatkan pertumbuhan dan perkembangan tanaman. Penelitian ini bertujuan untuk mendapatkan metode alternatif pengendalian gulma menggunakan bioherbisida, mengetahui pengaruh aplikasi bioherbisida terhadap populasi gulma serta pertumbuhan dan perkembangan tanaman kelapa sawit, dan mengetahui kandungan senyawa alelokimia pada bioherbisida saliara (Lantana camara). Penelitian dilaksanakan di Kebun Percobaan 2 Politeknik Kelapa Sawit Citra Widya Edukasi Bekasi, mulai bulan Juni 2017 sampai Juni 2018. Penelitian ini disusun dalam rancanganacak lengkap (RAL) non faktorialyang terdiri dari tiga perlakuan yaitu : A1 (tanpa aplikasi, kontrol), A2 (aplikasi herbisida Glifosat 1%), dan A3 (Bioherbisida Saliara 5%). Setiap kombinasi perlakuan diulang sebanyak 5 kali dan satu sampel sehingga terdapat 15 unit percobaan. Data dianalisis menggunakan ANOVA dan apabila berpengaruh nyata pada taraf 5% dilanjutkan dengan uji lanjut BNT (Beda Nyata Terkecil). Hasil percobaan menunjukkan bahwa aplikasi bioherbisida saliara dapat dijadikan metode alternatif pengendalian gulma di perkebunan kelapa sawit dan berpengaruh nyata terhadap daya tumbuh gulma pada 4 minggu setelah aplikasi. Berdasarkan pengamatan fisik, pertumbuhan dan perkembangan tanaman kelapa sawit dengan aplikasi bioherbisida secara umum menunjukkan hasil yang lebih tinggi dibandingkan perlakuan kontrol dan Glifosat. Kandungan senyawa kimia pada bioherbisida saliara adalah 2,63% Saponin, 5,73% Tanin, dan 0,17% Flavonoid. ABSTRACTThe existence of weed in plantation area could affect plant growth and development, as well as palm oil.The utilization of bioherbicide from saliara could be an alternative method for controlling weed without damaging the environment, and also increasing plant growth and development. The objectives of this experiment were to obtain the alternative method with using bioherbicide, to know the effect of bioherbicide application toweed population and also growth and development of immature oil palm, and to know allelochemicals content in bioherbicide saliara. This research conducted at Teaching Farm 2 Citra Widya Education Oil Palm Polytechnic Bekasi, from Juni 2017 until Juni 2018. This research was arranged in a factorial random block design with three treatmens, consist of A1 (without application, control), A2 (Glifosat 1%), dan A3 (Bioherbicide Saliara 5%). Each treatment repeated five times and one sample, so that there were 15 experimental units. The data was analysis of variance. If the analysis variance test result was significant at 5%, then it continued by Least Significance Different(LSD).The result showed that bioherbicide saliara could be as alternative method for controlling weed in palm oil plantation and has significant effect to weed growth at fo...

Gulma babadotan (Ageratum conyzoides) adalah gulma yang umumnya menjadi gulma dominan di berbagai areal budidaya tanaman sehingga limbah gulma ini akan sangat banyak didapatkan ketika selesai dikendalikan. Gulma ini juga memiliki senyawa alelokimia yang berpotensi sebagai bahan pembuatan bioherbisida yang ramah lingkungan. Efektivitas bioherbisida perlu diuji menggunakan tanaman yang memiliki perkecambahan yang cepat seperti kacang hijau, sebelum diaplikasikan ke gulma. Tujuan penelitian ini adalah mendapatkan bahan organik alternatif untuk bioherbisida, melihat pengaruhnya terhadap perkecambahan kacang hijau dan mengetahui rekomendasi dosis bioherbisida. Penelitian ini dilaksanakan pada April sampai Mei 2020 di areal percobaan Kabupaten Tubaba Lampung. Penelitian ini disusun dalam rancangan acak kelompok (RAK) satu faktor yang terdiri dari tiga perlakuan, yaitu M0 (tanpa aplikasi/kontrol), M1 (aplikasi bioherbisida 10 ml), dan M2 (aplikasi bioherbisida 20 ml). Setiap perlakuan terdiri dari 5 sampel diulang sebanyak 3 kali sehingga total kecambah yang digunakan adalah 45 kecambah. Data dianalisis menggunakan analysis of varians (ANOVA) dan apabila berpengaruh nyata pada taraf 5% dilanjutkan dengan uji lanjut Duncan Multiple Range Test (DMRT). Hasil penelitian menunjukkan bahwa babandotan dapat digunakan sebagai bahan bioherbisida serta berpengaruh nyata terhadap tinggi kecambah (2, 3, 4, 5 hari setelah aplikasi) dan kondisi fisik kecambah. Dosis bioherbisida yang direkomendasikan adalah 10 ml.