Response of Potato (Solanum tuberosum) in Medium Plains to Antagonistic Microbes and Potassium Fertilizers

Abstract

The use of antagonistic microbes and potassium fertilizer on potato cultivation at the medium land was carried out to improve plant endurance, yield and quality. Application of potassium doses and suitable antagonistic microbial types will strengthen plant cell walls and plant nutrients to be fulfilled. This research aims to study the growth response, yield and quality of potato bulb in land medium with the application of antagonistic microbes and potassium fertilizer. The height of the land is around 670 meters above sea level, the texture of the clay and the experimental design used is the Split Plot Design. Three kinds of antagonistic microbes are A1 (Pseudomonas fluorescens), A2 (Streptomyces sp. + P. fluorescens), A3 (Trichodermaviride + Streptomyces sp. + P. fluorescens), and three types of Potassium doses are: D1= 125 kg Ha-1 KCl, D2 = 250 kg Ha-1 KCl, D3 = 375 kg Ha-1 KCl. Each treatment has three replications, the number of plants per experiment plot is 22 plants, and the sample plants used in each trial plot are 6 plants. The results showed that the administration of P.fluorescens + Streptomyces sp. + T. viride and 250 kg Ha-1 KCl and 375kg Ha-1 KCl doses tend to produce growth, tuber fresh weight per hectare, tuber dry weight percentage, tuber specific gravity and higher sugar content than other treatments.

Respon dua genotip kentang (Solanum tuberosum L.) dengan pemberian tiga sumber pupuk nitrogen di dataran medium

“…Lahan dataran tinggi sangat terbatas, dengan adanya pengusahaan yang intensif akan menguras sumberdaya lahan karena produktivitas lahan rendah dan mengganggu kelestarian lingkungan (Rosyidah dkk., 2013) Dataran medium dengan ketinggian 300 -700 dpl tersedia luas di Indonesia. Kendala utama penanaman kentang di dataran medium adalah tingginya suhu sehingga berpengaruh pada menurunnya produksi dan kualitas umbi yang dihasilkan (Rosyidah & Handoko, 2020). Penurunan laju fotosintesis yang menyebabkan translokasi asimilat ke umbi, pembesaran umbi dan pengubahan sukrosa menjadi pati akan rendah serta serangan penyakit Ralstonia solanacearum menyebabkan menurunnya produksi juga kualitas.…”