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Journal : Soil REns

engaruh Dosis Pupuk NPK dan Ordo Tanah terhadap Kdd, Serapan K, dan Hasil Bibit Kentang (Solanum tuberosum L.) yang Diinokulasi Fungi Mikoriza Arbuskula dan Mycorrhiza Helper Bacteria Windy Amorita; Anne Nurbaity; Diyan Herdiyantoro
Soilrens Vol 14, No 2 (2016)
Publisher : Fakultas Pertanian Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (504.962 KB) | DOI: 10.24198/soilrens.v14i2.11127

Abstract

The productivity of potatoes in Indonesia is relatively low and unstable caused by unsuitable enviromental and soil conditions and bad cultivation system. This research was conducted to study the effect of NPK fertilizer dosages and soil order to soluble K, K Uptake, and yield of seed potatoes (Solanum tuberosum L.). The experiment design used a factorial randomized block design with two factors and three replication. The first factor was NPK fertilizer dosages with five levels (0, 25, 50, 75, 100% recomendation dosages) and the second factor was soil orders with two levels (Andisols and Inceptisols). The results of experiment showed that the interaction effect between NPK fertilizer dosages and soil orders had significantly effect to soluble K and K Uptake. There were independent effect of NPK dosages to diameter of potatoes tuber and independent effect of soils order to yield of seed potatoes. Andisols with 25% NPK and Inceptisols with 50% NPK were the best combination treatment to increase soluble K while treatment Inceptisols with 25% NPK was the best combination treatment to increase K Uptake. Dosages of 25% NPK was the best treatment to increase diameter of potatoes tuber while Inceptisols was the best treatment to increase yield of seed potatoes.Keywords : NPK Fertilizer Dosages, Andisols, Inceptisols, Potassium, Potatoes
Pengaruh Kombinasi Pupuk Hayati Konsorsium cair dengan Pupuk N, P, K terhadap Populasi Azotobacter sp., Serapan N, Bobot Kering dan Hasil Selada (Lactuca sativa L.) pada Andisols Lembang Setiawati, Mieke Rochimi; Lubis, Ary Satria; Sudirja, Rija; Suryatma, Pujawati; Setiawan, Ade; Herdiyantoro, Diyan
Soilrens Vol 22, No 1 (2024)
Publisher : Dept Ilmu Tanah & Sumberdaya Lahan Fakultas Pertanian Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/soilrens.v22i1.57234

Abstract

Andisols area is potentially developed as horticulture cultivation area such as lettuce. The low number of productions of lettuce in Indonesia can be optimized by fertilization. The application of biofertilizer is expected to intensify the efficiency of inorganic fertilization through the ability of nitrogen fixation bacteria. The aim of study was evaluating the effect of a combination between liquid biofertilizer consortium with N, P, K fertilizer on N-uptake, population of Azotobacter sp., dry biomass, and yield of lettuce (Lactuca sativa L.) in Andisols. This study was done in June 2015 until September 2015 in 2 locations, Balai Besar Pelatihan Pertanian in Kayuambon, Lembang, West Java with an altitude of 2084 meters above sea level and in Soil Biology Laboratory, Soil Science Department, Universitas Padjadjaran. As treatment, seven combination dose of fertilizer A = control (without any fertilizer); B = 100% dosage recommendation of N, P, K; C = liquid biofertilizer consortium 10 L ha-1; D = liquid biofertilizer consortium 10 L ha-1 + 100% dosage recommendation of N, P, K; E = liquid biofertilizer consortium 10 L ha-1 + 75% dosage recommendation of N, P, K; F = liquid biofertilizer consortium 10 L ha-1 + 50% dosage of recommendation of N, P, K; G = liquid consortium biofertilizer 10 L ha-1 + 25% dosage recommendation of N, P, K). The research design was in the complete Randomized Block Design (RBD) with four replications. Regarding the yield performance and population of Azotobacter sp. which is better than the other treatments is a treatment with liquid biofertilizer consortium 10 L ha-1 + 50% dosage of recommendation of N, P, K. The significant positive correlation between the yeild of lettuce with dry mass is 96.8% and nitrogen uptake of 84.2%