Rhizobia bacteria have been well known as nitrogen-fixing bacteria which could promote the growth of soybean plants. The bacteria could establish a symbiosis living with crops and trees legume. The successful symbiosis living is normally identified by the specific compatibilities between the bacteria and host plants. However, there is a chance that the bacteria which was isolated from trees legumes could also infect and be compatible in developing the symbiosis living with crops plant such as soybean. This study aims to confirm that Rhizobium bacteria isolated from tree legume, Acacia mangium, could successfully develop the symbiosis living with soybean. In addition, this research also studies the possibility of Rhizobium bacteria in working with other potential soil microbes such as mycorrhizae and others potential microbes on supporting the growth of soybean. Green house experiment showed that Rhizobium tropici combined with other potential soil microbes could significantly support the growth of soybean. This is shown with the increase of upper plant biomass. A number of pods although the data of visible soybean seed did not make significant different. This research finally opens the possibility of using biodiversity of nitrogen-fixing microbes to be packed as an update quality biofertilizer for soybean.
Dilakukan pembuatan pupuk kompos dari limbah Jerami padi sawah percobaan dan seresah daun tanaman buah-buahan kebun plasma nutfah Cibinong Science Center-Botanic Garden (CSC-BG) LIPI menggunakan bioaktivator StarTmik@OK dan Tricho Plus (LIPI) dan Promi (produk komersial). Kompos yang dihasilkan diaplikasikan kepada tanaman seledri (Apium graveolens L.) di rumah kasa (screenhouse) Puslit Bioteknologi-LIPI Cibinong, Kabupaten Bogor, Jawa Barat. Parameter pertumbuhan yang diamati adalah tinggi tanaman, jumlah petiol daun, dan biomassa. Penelitian disusun berdasarkan Rancangan Acak Lengkap (RAL) dengan tiga ulangan. Data hasil penelitian dianalisis secara statistik menggunakan SPSS ver. 24 dilanjutkan dengan uji jarak berganda Duncan (DMRT). Hasil menunjukkan bahwa secara umum kompos yang berasal dari jerami padi dengan menggunakan berbagai bioaktivator menghasilkan nilai rataan pertumbuhan tertinggi yaitu tinggi tanaman (35,7 cm), jumlah petiol (23,7), dan biomassa (42,3 g) dibandingkan dengan kompos yang menggunakan bahan lainnya. Penggunaan pupuk kimia masih diperlukan untuk meningkatkan pertumbuhan tanaman seledri.Abstract The organic waste of rice straw from the experimental paddy field and broadleaf litter from the fruit germplasm garden of Cibinong Science Center-Botanic Garden (CSC-BG) was processed into compost with the addition of bioactivators. The bioactivator of StarTmik@OK and Tricho Plus (LIPI) and Promi (commercial product) was added to the composting raw materials. Produced compost was then applied to celery (Apium graveolens L.) plants in the screenhouse of RD Center for Biotechnology-LIPI. The growth parameters observed were plant height, leaf petiole, and biomass. The experiment was arranged in a Completely Randomized Design (CRD) with three replications. Obtained data were statistically analyzed using SPSS ver.24, followed by Duncan’s multiple range tests (DMRT). The result showed that the highest growth rates, i.e., plant height (35.7 cm), number of petiol (23.7), dan biomass (42.3 g), were obtained by using rice straw compost using various bioactivators. Meanwhile, chemical fertilizer is still needed to increase the growth of celery plants.
Abstract. Sukiman H, Lekatompessy S, Widowati T, Nurjanah L, Nuriyanah. 2015. Encapsulation of Mollucan albizia's (Paraserianthes falcataria) seeds to support tree plantation program in urban areas. Nusantara .Green open space in urban areas and their outskirt is an essential requirement for healthy and clean cities. The success of tree plantation program requires the availability of high quality seeds. Several relevant researches have produced technologies which can support tree plantation programs, among others are seed encapsulation methods and the use of microbes for biological fertilizers. Encapsulation of seeds is aimed at protecting the seeds from extreme conditions that may occur during germination and, at the same time, providing microbes for the seedling growth. Results showed that nitrogen-fixing bacteria could be included in various materials of carriers for Moluccan albizia's (Paraserianthes falcataria) seeds. The microbes which grow in agar media as a carrier become the best encapsulation method compare to microbes grow in other carrier.
Limbah pertanian dan serasah daun mengandung unsur hara yang berpotensi sebagai bahan baku kompos yang berguna untuk memperbaiki struktur tanah dan pertumbuhan tanaman. Penelitian ini bertujuan untuk mengetahui pengaruh jenis bahan baku kompos terhadap pertumbuhan dan hasil cabai merah keriting. Percobaan menggunakan Rancangan Acak Lengkap (RAL) dengan 5 ulangan. Perlakuan terdiri dari kompos serasah daun bambu (K1), kompos serasah daun matoa (K2), kompos jerami (K3) dan kompos campuran ketiga bahan (K4). Parameter yang diamati yaitu tinggi tanaman, jumlah cabang, waktu berbunga dan berbuah, jumlah dan bobot buah. Hasil menunjukkan bahwa aplikasi kompos jerami pada tanaman cabai menghasilkan pertumbuhan dan hasil tertinggi dibandingkan kompos lain. Perlakuan kompos jerami memberikan rata-rata tinggi sebesar 107,6 cm, jumlah cabang 51,4, waktu berbunga pada hari ke-39, waktu berbuah pada hari ke-54, jumlah buah sebanyak 118,6 dan bobot buah sebesar 230,6 g.ABSTRACTAgricultural waste and leaf litter contain nutrients that have potency as raw material for compost which is useful for improving soil structure and plant growth. The aim of this study was to determine the effect of compost raw materials on growth and yield of chili. The experiment used a completely randomized design with 5 replications. The treaments consisted of bamboo leaf litter compost (K1), matoa leaf litter compost (K2), rice straw compost (K3) and mixed compost of the tree materials (K4). The parameters observed were plant height, number of branch, time of and flowering and fruiting, number and weight of fruit. The results showed that application of rice straw compost on chili plant produced the highest growth and yield compared to other compost. The rice straw compost treatment gave an average height 107.6 cm, number of branch 51.4, time of flowering on day 39, time of fruiting on day 54, number of fruit 118.6 and weight of fruit 230.6 g.
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