Respons Hasil Padi dan Hara Tanah Sawah terhadap Bakteri Pelarut Fosfat dan Pemfiksasi Nitrogen

The condition of unfertile paddy field due to excessive inorganic fertilizer application causing soil degradation. Fertilizing techniques using phosphate solubilizing and nitrogen fixer bacteria are breakthroughs that should be developed in paddy cultivation to increase fertility soil and harvest of rice. This research aims to study on phosphate solubilizing and nitrogen fixer bacteria ability to increase the harvest of rice by increasing chemical and biological fertility of soil. The research was conducted in the greenhouse of Sawah Baru experimental garden, IPB University. The design used was a completely randomized design with one factor that was dosage of inorganic fertilizers (NPK) with seven levels that were control, NPK 100%, NPK 0% + bacteria, NPK 25% + bacteria, NPK 50% + bacteria, NPK 75% + bacteria and NPK 100% + bacteria. Each stage was repeated four times, so there were 28 units. The results of phosphate solubilizing and nitrogen fixer bacteria could produce more rice grain 0.32 ton.ha^-1 than NPK 100% (recommended dose). Biological soil fertility improved with the increased population of bacteria, but there was no improved soil chemical fertility of soil.

Adaptasi Pertumbuhan Setek Bunga Krisan (Chrysanthemum sp.) Menggunakan Naungan di Banjarbaru, Kalimantan Selatan [Growth Adaptation of Chrysanthemum Cuttings (Chrysanthemum sp.) Using Shade in Banjarbaru, South Kalimantan]

<p>Banjarbaru merupakan salah satu daerah di Kalimantan Selatan yang memiliki prospek yang baik sebagai daerah pengembangan komoditas krisan. Pertumbuhan tanaman krisan sangat dipengaruhi oleh beberapa faktor, misalnya media tanam, ketersediaan air dan hara, iklim mikro, suhu, kelembaban, serta intensitas cahaya matahari tertentu sehingga untuk memenuhi kebutuhan akan cahaya yang optimal maka perlakuan naungan diperlukan selama fase pertumbuhannya. Penelitian ini bertujuan mengetahui pengaruh persentase kerapatan pada naungan terhadap pertumbuhan setek krisan varietas Puspita Nusantara. Penelitian dilaksanakan pada Bulan November sampai Desember 2020, bertempat di Kebun Percobaan Jurusan Agroekoteknologi Fakultas Pertanian Universitas Lambung Mangkurat Banjarbaru. Metode yang digunakan pada penelitian yaitu Rancangan Acak Kelompok (RAK) dengan perlakuan kerapatan paranet, yaitu n1 (paranet dengan kerapatan 75%), n2 (paranet dengan kerapatan 100%), n3 (paranet dengan kerapatan 125%), dan n4 (paranet dengan kerapatan 150%), yang terdiri atas lima kelompok sehingga terdapat 20 satuan percobaan, dan setiap satuan percobaan terdapat lima unit tanaman. Hasil penelitian menunjukkan bahwa persentase naungan berpengaruh terhadap parameter jumlah daun, persentase setek hidup, dan tinggi tanaman yang tumbuh, tetapi tidak berpengaruh nyata pada saat awal muncul tunas. Perlakuan n2 berpengaruh paling baik terhadap persentase setek hidup (64%), jumlah daun (4,1 helai) serta tinggi tunas (4,26 cm).</p><p><strong>Keywords</strong></p><p>Krisan; Setek; Paranet; Iklim mikro</p><p><strong>Abstract </strong></p><p>Banjarbaru as one of the areas in South Kalimantan has good prospects as a chrysanthemum development area. The growth of chrysanthemums is strongly influenced by several factors, such as planting media, availability of water and nutrients, microclimate, temperature, humidity, and a certain intensity of sunlight, so to meet the need for optimal light, shade treatment is required during the growth phase. This study aims to determine the effect of the percentage density in the shade on the growth of chrysanthemum cuttings of the Puspita Nusantara variety. The research was carried out from November to December 2020, at the Experimental Garden of the Department of Agroecotechnology, Faculty of Agriculture, Universitas Lambung Mangkurat, Banjarbaru. The method used in this research is a Randomized Block Design (RBD) with the treatment of n1 (shading net with a density of 75%), n2 (shading net with a density of 100%), n3 (shading net with a density of 125%), and n4 (shading net with a density of 150%), which consisted of five groups so that there were 20 experimental units, and each experimental unit contained five plant units. The results showed that the percentage of shade affected the parameters of the number of leaves, the percentage of live cuttings, and plant height that grew, but had no significant effect on the initial emergence of shoots. The n2 treatment had the best effect on the percentage of live cuttings (64%), the number of leaves (4.1 strands), and shoots height (4.26 cm).</p><p> </p>

Application of Foliar Fertilizer and Planting Media On Cattleya sp. Orchid Growth

Cattleya is one of the orchid genera, it has many fans. Labellum is large and strike colors. Intergeneric crosses have been made to produce soft colored flower, such as white, pink, red, yellow and brown. Cattleya orchids are known to have large flowers, and they are commonly referred to as The Queen of Orchid. These species are cultivated by several botanists as cut flower commodities. The price of cattleya is costly, so it becomes a business opportunity that needs to be developed. This study aims to examine the types of foliar fertilizers and planting media used on the growth of cattleya orchids. It was conducted between May and August 2021 in the experimental garden of the Faculty of Agriculture, UPN Veteran Yogyakarta using a Split Plot Design with factorial. The first factor, which is foliar fertilizer, consists of quick grow, AB mix, and focus grow. The second factor of planting media includes fern roots, black moss, and kadaka roots media. The result showed that AB Mix on fern and kadaka media produced similar plant height compared to other treatments. While on kadaka media, it produced the best leaf length and width, as well as shoot length. Furthermore, the shoot emergence and the number of roots did not show a significant difference. The plants that received quick grow treatment on kadaka and black moss media had similar growth. The number of roots provided the best growth of kadaka and ferns. Further study should be conducted to test AB Mix with various concentrations and planting media.

Pertumbuhan Tanaman Vanili (Vanilla planifolia) dalam Polybag pada Beberapa Kombinasi Media Tanam dan Frekuensi Penyiraman Menggunakan Teknologi Irigasi Tetes

The study aimed to find the media composition and watering frequency through drip irrigation technology, which is appropriate to support the growth of vanilla plants in polybags. The research was conducted in the STIPER Dharma Wacana Metro experimental garden from April to July 2020. The first factor is the composition of the planting medium, namely soil + manure, soil + manure + rice husks, soil + manure + sand, and soil + manure + cocopeat. The second factor is watering frequency, namely 1, 2, and 3 times a day. Each treatment was repeated three times. The variables observed included plant height (cm), number of leaves (strands), shoot fresh weight (g), root fresh weight (g), and biomass dry weight (g). The use of mixed media of soil, manure, and cocopeat is the best media composition by producing a root wet weight of 8.0 g and a dry weight of 7.2 g. The frequency of watering three times a day resulted in the best height of vanilla plants being 51.8 cm compared to the frequency of watering once and twice a day. There was no interaction between the composition of the growing media and the frequency of watering on vanilla plants growth in polybags.

Respons Tanaman Jagung (Zea mays l.) Terhadap Pemberian Kombinasi Pupuk Anorganik dan Pupuk Organik Fermentasi (Porasi) Kotoran Sapi

This study aims to determine the dose combinations of inorganic fertilizers and the fermentation of organic cow dung that respond well to corna. This research was conducted by August to November 2020, in the experimental garden of the Agriculture Faculty, Siliwangi University, Mugarsari Village, Tamansari District, Tasikmalaya City with a height of 360 meters above sea level (m asl). The study used a randomized block design (RBD) with 6 treatments and was repeated 4 times. Dose tested P0 = control (without being given fertilizer), P1 = Poration of cow dung 20 t / ha, P2 = NPK 300 kg / ha, P3 = NPK 250 kg / ha + cow dung poration 5 t / ha, P4 = NPK 200 kg / ha + poration of cow dung 10 t / ha and P5 = NPK 150 kg / ha + poration of cow dung 15 t / ha. The results showed that the application of NPK fertilizer and cow dung could be responded to by corns, with the results of statistical analysis that was significantly different on plant height at 18 DAS, weight of 100 seeds and shelled weight per hectare.

Effectiveness of Clove Nano Biopesticides Against Mosaic Virus in Patchouli

Clove oil has the potential to suppress the development of the mosaic virus in patchouli plants, but its effectiveness in the field has not been studied. This study aimed to evaluate the effect of clove nano biopesticide on controlling patchouli mosaic disease. The research was conducted at the Manoko Experimental Garden, Bandung, West Java from March to November 2018. The patchouli used was Patchoulina-2 variety, which originated from the Seed Breeder Garden in Lembang, Bandung. This study was arranged in a Randomized Block Design (RBD), consisting of five treatments and ten replications within each treatment, with one hundred plants in each replication. The results obtained showed that nano biopesticides of citronella, clove, and commercial citronella (Asimbo) were able to reduce the incidence and intensity of mosaic diseases in patchouli plants, showing the efficacy levels of 14.68%, 9.06%, and 5.83%, respectively. The application of citronella and clove biopesticides on Patchoulina-2 every month could increase plant fresh weight, when compared to the plants without treatment. Patchoulina-2 plants treated with nano biopesticides of clove and commercial citronella (Asimbo) showed higher value of fresh weight compared to those treated with citronella nano biopesticide. The clove nano biopesticide can also be developed to control mosaic diseases in patchouli plants.

Application of Riau local entomopathogen fungi Beauveria bassiana toward Spodoptera litura pest and plants growth red chili

Red chili is a horticultural crop that is widely cultivated commercially. The need for red chili is increasing, in accordance with the increasing variety of types of food that use red chili as a raw material. Pest attacks on red chili plants are an obstacle in red chili cultivation. Spodoptera litura is a red chili pest that can cause yield reductions of up to 80%. Control using the Riau local entomopathogenic fungi Beauveria bassiana is an effort to control S. litura using environmentally friendly materials. This study aims to determine the effect of the application of the Riau local entomopathogenic fungi B. bassiana to contol S. litura pests and the growth of red chili plants. The research was carried out at the Plant Pest Laboratory and Experimental Garden, Faculty of Agriculture, Riau University from July to August 2020. This study was designed in a completely randomized design with five treatments, namely the concentration of Riau local Riau B. bassiana 20 gl-1 water, 25 gl-1 water, 30 gl-1 water, 35 gl-1 water and 40 gl-1 water and four replications to obtain 20 experimental units. The results showed that the concentration of Riau local B. bassiana 30 gl-1 of water containing a conidia density of 4.1 × 108 con.ml-1 was a concentration that affected S. litura pests and chili plant growth by causing the intensity of S. litura pests which could be categorized as lower at 4.15% and can cause a peak in larval death on the fourth day after application.

The Effect Of Giving Banana Stem Compos With EM4 Concentration Variation And Urea Fertilizer On The Growth Of (Pepper nigrum L.) Cuttings Of Malonan 1 Variety

This research was conducted at the Experimental Garden of Widya Gama Mahakam University Samarinda, Faculty of Agriculture, Jalan KH. Wahid Hasyim. The study was conducted in January - April 2020. This study used a factorial randomized block design (RBD) with 2 treatment factors and 3 replications. The first factor was the application of banana stem compost with various concentrations of EM4 consisting of 4 levels, namely P0 = banana stem compost without EM4, P1 = banana stem compost with EM4 concentration of 50 ml L-1 water, P2 = banana stem compost with EM4 concentration of 75 ml. L-1 water, P3 = banana stem compost with a concentration of EM4 100 ml L-1 water and the second factor is the dose of urea fertilizer which consists of 4 levels, namely, D0 = control, D1 = 1 g urea / polybag, D2 = 2 g urea / polybag, D3 = 3 g urea / polybag. The results of the research giving banana stem compost with variations in the concentration of EM4 and the dose of urea fertilizer and the interaction of the two treatments had a very significant effect on plant height at the age of 20, 40, 60 and 80 DAS, with the best treatment P3 = 28.67 cm, D3 = 28, 21 cm and P3D3 = 32.33 cm, then had a very significant effect on the number of shoots at the age of 60 and 80 DAS with the best treatment P3 = 6.67 fruit, D3 = 6.17 fruit and P3D3 = 8.33 fruit, and very influential significant on the number of leaves at the age of 40, 60 and 80 DAS with the best treatment P3 = 8.58 strands, D3 = 8.83 strands and P3D2 = 10.67 strands.

Aplikasi Pupuk Cair Plus Silika Dengan Pupuk Anorganik N,P,K Terhadap Pertumbuhan dan Hasil Tanaman Padi (Oryza Sativa L.) Pada Inceptisol Jatinangor

This experiment aims to determine the effect of various concentrations of liquid fertilizer plus silica combined with N, P, and K inorganic fertilizers on the growth and yield of rice plants (oryza zativa). The trial was conducted in July 2018 to November 2018 in the Ciparanje experimental garden of the Faculty of Agriculture, Padjadjaran University, Jatinangor, Sumedang. The method used is Randomized Block Design (RBD) which consists of ten treatments with three replications; Treatment (A) Control, (B) standard NPK, (C) Plus Silica Liquid Fertilizer, (D) ¼ NPK + Silica Plus Liquid Fertilizer, (E) ½ NPK + Silica Plus Liquid Fertilizer, (F) ¾ NPK + Liquid Fertilizer Silica Plus, (G) NPK + Silica Plus Liquid Fertilizer, (H) ¾ NPK + ¼ Silica Plus Liquid Fertilizer, (I) ¾ NPK + ½ Silica Plus Liquid Fertilizer, (J) ¾ NPK + ¾ Silica Plus Liquid Fertilizer. The results showed that there was an effect of silica fertilizer on the growth and number of tillers after rice 8 MST. The treatment of F (¾ NPK + Liquid Fertilizer Plus Silica) gave the highest value to the yield of rice plants with the results of 53.31 gr of crop.

PENGARUH PEMBERIAN DOLOMIT DAN PUPUK KANDANG SAPI TERHADAP PERTUMBUHAN DAN PRODUKSI TANAMAN KEDELAI (Glycine max (L.) Merr) DI TANAH ULTISOL

This research was conducted at the ATC Experimental Garden, Faculty of Agriculture, Sriwijaya University, Indralaya, Ogan Ilir Regency, and began in September 2019 until February 2020. The analyzes of soil and plant have been carried out at the Laboratory of Chemistry, Biology, and Soil Fertility, Soil Department, Faculty of Agriculture, Sriwijaya University, Indralaya. This study aims at determining the effect of dolomite and cow manure on the growth and production of soybean (Glycine max (L.) Merr) in Ultisol Soil. This study used a factorial randomized block design with 2 treatment factors and 3 replications. The first factor is dolomite CaMg (CO3)2 consisting of two levels, 5 tons ha-1 and 10 tons ha-1. The second treatment factor is cow manure consisting of three levels, namely without manure, 10 tons ha-1, and 20 tons ha-1. The results indicated that interaction the giving of dolomite and cow manure had a significant effect in increasing soil pH, and plant N uptake. The giving of dolomite 10 tons ha-1 significantly affected the weight of 100 seeds and soybean production The giving of cow manure 20 tons ha-1 had a very significant effect on plant height, total number of pods, and the number of filled pods of soybean in Ultisols.