Servo' is high yielding variety, but the fruit weight lower than consumer preference. The researched was aimed to understand the effects of branch number on plant growth, branch and fruit number on yield components and fruit yield; and to obtain best branch and fruit number producing maximal yield and fruit size. The researched was conducted in field and arranged in a factorial 3x3+1 randomized complete block design with three blocks as replications. Branch number, as first factor, was maintained number of one, two, and up to three branches. Fruit number, as second factor, was maintained a number of 10, 15, and up to 20 fruits. The control treatment was growed naturally. Data were analyzed using analysis of variance. Post hoc analysis used were Tukey's Honest Significant Difference with significance level of 5%. Results showed that reduction branch number didn't affect plant growth. Reduction fruit number, however, increased tomato yield components and reduction fruit number down to 4 fruit sets increased 'Servo' fruit weight up to 93,81 g.
Soybean varieties suitability in agroforestry system with kayu putih under influence of soil quality parameters 1 The existence of soybean varieties and soil type interaction causes differences in productivity of soybean varieties in agroforestry systems with kayu putih. Soil quality parameters (physical, chemical and biological characteristics) will affect the productivity of soybean varieties. The objective of this study was to reveal the relationship between soil quality parameters with soybean varieties suitability in agroforestry system with kayu putih over three locations in which their soil type were different, i.e. Lithic Haplusterts, Ustic Epiaquerts and Vertic Haplustalfs. The study was conducted from May to August, 2018 in Menggoran Forest Resort, Playen District, Gunungkidul Regency, Special Province of Yogyakarta, Indonesia. The highest yield of soybean per hectare on Dering I grown in Lithic Haplusterts and Ustic Epiaquerts was 1.38 and 1.27 tons.ha -1 , respectively, while Grobogan in Ustic Epiaquerts 1.24 tons.ha -1 . Dering I showed the mean of the highest yield and most suitable in all soil types, while Gema showed the mean of the lowest yield and not suitable in all soil types. Soil quality parameters that had a significant influenced on the production of soybean varieties in agroforestry systems with kayu putih were chemical characteristic consisting of availability of P, Mg, NH 4 + , Mn and Ca.
Penggunaan topsoil sebagai media tanam pada budidaya cabai rawit dalam skala pot, hendaknya mulai dikurangi karena kualitas dan kuantitasnya mulai terdegradasi. Penelitian ini bertujuan mendapatkan jenis dan komposisi media tanam untuk mensubstitusi sepertiga topsoil dari total media tanam yang dapat mendukung pertumbuhan dan hasil tanaman cabai rawit (Capsicum frutescens L.) dalam skala pot. Penelitian dilakukan di Pusat Inovasi Agroteknologi (PIAT) Universitas Gadjah Mada di Kalitirto, Berbah, Sleman, D.I. Yogyakarta, dan Laboratorium Manajemen Produksi Tanaman Fakultas Pertanian UGM pada bulan April-Desember 2018. Rancangan yang digunakan yaitu Rancangan Acak Kelompok Lengkap (RAKL) dengan 4 blok sebagai ulangan. Penelitian ini terdiri dari 7 macam perlakuan komposisi media tanam (kombinasi dari tanah topsoil, pupuk limbah kotoran ayam, pasir, kokopit, arang sekam) dengan 1 perlakuan kontrol (tanah topsoil:pupuk limbah kotoran ayam (2:1)). Variabel yang diamati berupa variabel pertumbuhan tanaman dan komponen hasil tanaman cabai rawit. Data yang diperoleh dianalisis varians (ANOVA) dengan α=5%, dilanjutkan dengan uji HSD-Tukey. Hasil penelitian menunjukkan komposisi media tanam yang diujikan menghasilkan pertumbuhan dan hasil tanaman cabai rawit dalam skala pot yang tidak berbeda nyata. Subsitusi sepertiga topsoil dari total media tanam menggunakan pasir, arang sekam, kokopit, maupun campuran dari bahan-bahan tersebut dapat mendukung pertumbuhan dan hasil cabai rawit dalam skala pot, khususnya di lahan-lahan sub optimal maupun perkotaan.
Controlling soil-borne pathogens is a significant problem in agriculture. Arbuscular mycorrhizae have a potential role in controlling soil-borne pathogens by increasing plant phytohormone contents. However, the mechanism of resistance by mycorrhizae has not been fully elucidated, particularly against bacterial wilt disease in Solanaceae. This study examined the role of mycorrhizae in expressing genes involved in the signaling pathways mediated by jasmonic acid (JA) and salicylic acid (SA) in tropical chili pepper against the bacterium Ralstonia solanacearum. Seedlings from ten genotypes of chili pepper were inoculated with a consortium of five mycorrhizal species and/or inoculated with a mixture of nine isolates of R. solanacearum. The leaves of 10-week-old plants after the treatment were sampled for real-time polymerase chain reaction analysis. The results showed that the mycorrhizae strengthened the immune system of tropical chili pepper by increasing the relative gene expression levels of JA and SA in genotypes with high and low responsiveness to the mycorrhizae. The relative gene expression level of JA was related to the percentage colonization of mycorrhizae and the resistance of the tropical chili pepper genotypes to R. solanacearum. The relative gene expression level of SA was associated with the resistance of tropical chili pepper to R. solanacearum.
Minat masyarakat Permukiman Rejowinangun Yogyakarta terhadap penanaman pohon buah untuk alternatif tanaman penghijauan, sebagai bagian dari pengembangan lanskap produktif, cukup tinggi. Penelitian bertujuan mengetahui pendapat masyarakat mengenai penghijauan permukiman perkotaan dengan pohon buah serta mengetahui tingkat keindahan alternatif pohon buah. Metode penelitian dilakukan dengan metode survei pengambilan data secara stratified purposive sampling dan analisis Scenic Beauty Estimation (SBE). Penelitian dilaksanakan di Kelurahan Rejowinangun Yogyakarta. Hasil penelitian menunjukkan, sebagian besar masyarakat setuju terhadap pelaksanaan penghijauan dengan pohon buah dengan memperhatikan teknis penanaman pohon. Pengetahuan masyarakat Rejowinangun terhadap buah lokal Yogyakarta di sekitar jalan sekunder sebesar 11,11%, jalan tersier sebesar 21,48%, dan jalan kuarter sebesar 20%. Alternatif pohon buah untuk penghijauan jalan dengan nilai SBE tertinggi yaitu jambu air (Eugenia aquea; 67,61), kepel (Stelechocarpus burahol; 67,22), dan jambu dersono (Syzygium malaccense; 61,13).
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