Judul: Pengaruh Kepadatan Tanah Terhadap Pertumbuhan dan Produksi Kacang Tanah (Arachis hypogaea L.)
Abstrak: The population growth increase the consumption of the food. These conditions require the agricultural sector to increase production. To increase agricultural production can be done by agricultural intensification that applies maximum tillage systems. But without realizing, the long-term intensive tillage can cause soil compaction. The purpose of this research is to find out and see the effect of soil compaction, expressed by the differences in soil bulk density, to support the growth, yield production, and penetrating of gynofora on peanut. This research used soil material from Jasinga district (Podsolik Jasinga), conducted at Soil Physical and Conservation Laboratory, Soil Chemistry Laboratory, Departemen of Soil Science and Land Resources, Faculty of Agriculture IPB, and Greenhouse of University Farm IPB. Completed random design is used as experimental design and Duncan’s Multiple Range Test (DMRT) is used to identify the effect of treatment. The bulk density results of the research showed that the increasing of soil density (soil compaction) has significantly affect on hydraulic conductivity and soil resistance value before planting or after planting peanuts, but didn’t significantly affect on water holding capacity at field capacity used Alhricks. For peanut, soil compaction significantly affect to plant height, stem diameter, number of leaves, number of flowers, wet canopy biomass and root length. The soil compaction didn’t significantly affect on canopy biomass dry, wet and dry root biomass. The soil compaction gives a significantly affect on crop yield production (peanut and seed). Effect of soil compaction was also visible at gynofora penetration and growth.
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Judul: Respon Pertumbuhan dan Produksi Dua Varietas Kacang Tanah (Arachis hypogaea L.) terhadap Sistem Tanam Alur dan Pemberian Jenis Pupuk
Abstrak: This research aims to study the effect of cropping systems and types of fertilizers on the growth and production of two varieties of peanut (Arachis hypogaea L.). The experiment was conducted at IPB Dramaga Leuwikopo KP, Bogor in February-June 2013. Experiments using a split plot design with a treatment consisting of two factors, namely cropping systems as main plots and fertilizer as the subplot. Cropping systems in the main plot consists of two levels, the deep furrow planting and conventional planting. Types of fertilizers on subplot consisted of three levels i.e. chicken manure, chicken manure + Dolomite lime, chicken manure + Dolomite lime + NPK compound. The results showed that the deep furrow planting system increase productivity based on dry kernel weight and dry pod weight better than conventional planting system. This is shown by the productivity of dry pods of Gajah variety of 2.93 tonnes ha-1 at deep furrow planting system than 2.55 tonnes ha-1 at conventional planting system, and for Jerapah variety of 2.61 tonnes ha-1 at deep furrow planting system than 2.22 tonnes ha-1 at conventional planting system. Peanut cultivation by deep furrow planting system can improve efficiency in the use of plant nutrients supplied, both organic and inorganic fertilizers, so that the growth and yield of groundnut better. Fertilizers type of chicken manure + Dolomite lime + NPK compound give better effect on the growth and yield of plants than other fertilizers types.
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Judul: Gambaran darah ikan mas Cyprinus carpio yang terinfeksi koi herpes virus
Abstrak: Iak memiliki sistem pertahanan tubuh untuk melawan berbagai macam penyakit. Pertahanan tubuh ikan terbagi 2 sistem yaitu pertahanan non-spesifik yang terdiri atas kulit, sisik, lendir dan darah dan pertahanan spesifik yaitu antibodi. Darah adalah cairan tubuh, yang berfungsi mengangkut oksigen, makanan dan hormon ke seluruh jaringan agar semua sel dapat berjalan sesuai fungsinya.
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