Bawang merah merupakan salah satu komoditas hortikultura strategis yang penyebarannya hampir di seluruh wilayah Indonesia. Permasalahan pengembangan komoditas ini adalah masih rendahnya produktivitas sebagai akibat adaptasi dan kecukupan asupan hara tanaman. Penelitian yang bertujuan untuk mendapatkan jenis pupuk NPK yang efektif dan efisien telah dilakukan di desa Langensari Kecamatan Lembang Kabupaten Bandung Barat dari Maret sampai Mei 2014 menggunakan Rancangan Acak kelompok (RAK) dengan 6 perlakuan dan 3 kali ulangan. Pupuk NPK yang digunakan adalah A= NPK 18+9+10+Te, B=NPK 15+15+sulfat 10, C=NPK 12+11+18z+(S) z +3 Mg+3,8S+Te, D= NPK 15+9+20(S)+2 MgO+3,8 S+Te, E= NPK 25+7+7 dan F=kontrol. Parameter yang diamati meliputi: tinggi tanaman, jumlah umbi, jumlah daun, panjang umbi (cm), diameter umbi (cm), bobot basah (g) dan bobot kering brangkasan (g). Hasil penelitian menunjukkan bahwa NPK 12+11+18z+(S)z+3 Mg+3,8S+Te menghasilkan bobot umbi terbaik. The shallot is one of the strategic and valuable horticultural commodities which is spreaded almost all over Indonesia area. Commodity development constrain by the low productivity as a result of adaptation and inadequate intake of plant nutrients. The research purposed to get the kind of NPK fertilizers that was efective and efficient on shallot production had been done in the Langensari village Langensari Lembang district, West Bandung regency from March till May 2014, using Randomized Block Design (RBD) with 6 treatments and 3 repplications. NPK fertilizer used were: A = NPK 18+9+10+Te, B = NPK 15+15+sulfate 10, C = NPK 12+11+18z+(S) z + 3 Mg+3,8S+Te, D = NPK 15+9+20(S)+2MgO+3,8 S+Te, E = NPK 25+7+7 and F = control. The observed parameters were plant height (cm), number of tubers, leaf number, tuber length, tuber diameter, fresh weight and dry weight tuber. The results showed that NPK 12+11+18z+ (S)z+3 Mg+3,8S+Te gave the best growth and production.
Constraint of peat land utilization is low nutrent content. This research was conducted to determine the potency of phosphate solubilizing microbes (PSM) in solubilizing P yto increase the growth and P uptake of plant in peat soil. Based on their ribosomal DNA the best PSM were identified as Burkholderia gladioli nd Penicillium aculeatum that yield the highesr growth aphosphate uptake of oil palm seedling.
Weed competition will reduce rice yield. The research aimed to study the effect of difference weed control methods on rice yield in SOBARI. It has been conducted from October 2013 until February 2014, using Randomized Block design with five treatments (A = manual weeding, B = unweed control, C = herbicide containing Penoxulam + Cyhalofop-butyl, D = Bispyribac sodium, and E = 2, 4 D + Methyl metsulfuron). The results showed that weed control using herbicides containing Bispyribac sodium and 2.4 D + Methyl metsulfuron showed similar results as manual weed control on rice yield.
Research on the application of fermented plant extracts to increase the antioxidants of mustard greens has taken in the experimental garden of Horticulture Seed Center in Riau Province, from June to October 2018. This study used a completely randomized design with six treatments and three replications. (A) = neem leaves; (B) = sour-sop leaves; (C) = the crown of the god; (D) = lemongrass; (E) = mixture of plant extracts (neem leaves, sour-sop leaves, god’s crown fruit and lemongrass); and (F) = control. The parameters observed in this study were vitamin C content (mg/100 g), total phenol content (mg/100 g) and total antioxidant activity (% inhibition). The purpose of this study was to determine the effectiveness of several kinds of plant extracts (neem leaves, soursop leaves, god’s crown fruit and lemongrass and a mixture of several plant extracts) fermented with EM4 on levels of vitamin C, total phenol content and antioxidants of mustard greens. The results showed that in general, the fermented neem leaf treatment provided the highest effectiveness for all parameters compared to other plant extracts, namely vitamin C levels (72,846 mg/100 g), total phenol content (0.074 mg/100 g) and antioxidant (75.230%).
Keterbatasan lahan potensial menyebabkan perluasan areal pertanian mengarah pada lahan gambut. Kendala pengembangan lahan gambut adalah rendahnya kandungan hara tersedia bagi tanaman. Fosfat (P) merupakan salah satu unsur hara makro yang penting untuk pertumbuhan dan produksi tanaman, disisi lain ketersediaan hara ini pada lahan gambut terbatas karena ikatan asam organik dan sifat yang mudah tercuci. Penelitian untuk menguji pengaruh ameliorasi dan inokulasi mikroba pelarut fosfat terhadap ketersediaan hara P di lahan gambut dilakukan di kebun pembibitan kelapa sawit petani di Riau dari Oktober 2013 - Maret 2014, menggunakan Rancangan Acak Kelompok pola Faktorial dengan 30 kombinasi perlakuan dan 3 kali ulangan. Variabel yang diamati meliputi : tinggi tanaman, lingkar batang, jumlah daun, lebar daun, panjang daun, kandungan hara tanaman, dan bobot biomasa bibit setelah 5 bulan di pembibitan. Hasil penelitian menunjukkan bahwa ameliorasi menggunakan kompos tandan kosong kelapa sawit mampu meningkatkan P tersedia, serapan P oleh batang dan akar, berat brangkasan dan berat kering batang. Sedangkan mikroba pelarut fosfat berpengaruh secara tidak nyata.The limitation of potential land leads agricultural development expansion to the peat soil area. Constrain of the peatland development is the low nutrient content that is required by plant. Phosphate is one of major growth and production limiting nutrient because of the solublelize of the organic acids and immobility The research was conducted from October 2013 – March 2014 at the farmer main nursery in Riau province to test the effect of amelioration and phosphate solubilizing microbe inoculation on P availability on palm oil seedling growth and production at peatland, used Randomized Block Design with 30 treatments and 3 replications. The parameters observed were plant height, leaf number, leaf width, leaf length, stem diameters, nutrient contents, also fresh and dry weight after 5 months at the main nursery. The result showed that palm oil empty fruit bunch compost as ameliorant increased P nutrient avaibility, P uptake, fresh and dry weight, whereas phosphate solubilizing microbe was unsignificant.
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