Respon Mikoriza dan Kendaga Cangkang Biji Karet Terhadap Pertumbuhan Produksi dan Intensitas Serangan Hama dan Penyakit Pada Tanaman Kedelai (Glycine Max.L.)

Abstract

This research was conducted at the Deli Tobacco Research Center of PT. Perkebunan Nusantara II, Deli Serdang Regency, with a height of 13 meters above sea level (asl), from 22 July 2019 to 02 October 2019. The design used in this study was a factorial randomized block design (RBD) consisting of 2 treatment factors, namely: (1) mycorrhizae use factor (M notation) with 4 levels of treatment, namely: M0 = Control (without mycorrhizae); M1 = mycorrhizae 5 g/plant; M2 = mycorrhizae 10 g / plant; M3 = mycorrhizae 15 g / plant, (2) Factors of biochar use in rubber seed shells (notation B) with 4 levels of treatment, namely: B0 = Control (without biochar); B1 = Biochar 50 g / plant; B2 = Biochar 100 g / plant; B3 = Biochar 150 g / plant, repeated 2 times. Parameters observed: plant height, stem diameter, number of leaves, leaf color, number of branches/ samples, number of branches / plots, type and intensity of pest and disease attacks, number of pods / sample, pod weight / sample, number of pods / plot, weight pod/ plot, seed weight / sample, seed weight / plot, root volume and mycorrhizae colonization. The results of the study: 1) Mycorrhizae application has a very significant effect on the number of leaves aged 4, 5, 6 MST, number of pods per sample, pod weight per sample, number of pods per plot, pod weight per plot, seed weight per sample and seed weight per plot ; significant effect on leaf color age 6 MST, pod weight per plot and root volume, but no significant effect on the intensity of the attack of Ladybug Pests (Riptortus linear), Leaf Rust (Phakopsora pachyrhizi), plant height, stem diameter, leaf color age 2 - 5 MST, number of branches per sample and number of branches per plot. The highest production of 207.89 g / plot (equivalent to 1.72 tons / ha) is obtained by giving mycorrhizae as much as 15 g / plant; 2) Application of biochar kendaga rubber seed shell has a very significant effect on leaf color age of 2 MST and number of pods per plot, significantly affect the number of pods per sample, seed weight per sample and root volume, but does not significantly affect the intensity of Ladybug Pests (Riptortus liniaris), Leaf Rust Disease (Phakopsora pachyrhizi), plant height, stem diameter, number of leaves, leaf color, number of branches per sample, number of branches per plot, pod weight per sample, pod weight per plot and seed weight per plot; 3) Interaction between mycorrhizae application with biochar kendaga rubber seed shells does not significantly affect the growth and production of soybean plants and the intensity of pest attack Kepin Pod (Riptortus liniaris), and Leaf Rust Disease (Phakopsora pachyrhizi).