Pengaruh Kombinasi NPK dan Pupuk Kandang terhadap Sifat Tanah dan Pertumbuhan serta Produksi Tanaman Caisim

Abstract

The study was conducted in Keputran village, Tanggamus District, Lampung Province.  The aim of this study to find out a proper combination of NPK fertilizer and chicken manure for the vegetable crops, especially chinese mustard (Brassica campetris Var. Chinensis L.) in order to increase the production.   A randomized complete block design was used in this experiment with ten treatments and three replications. The result showed that the application of chicken manure with the dosage of less than 5 Mg ha^-1 was combined with NPK fertilizer did not effective to affect the increasing of growth and production of chinese mustard. Meanwhile application of chicken manure more than 5 Mg ha^-1 was combined with NPK fertilizer significantly affected the growth, production of chinese mustard and soil properties i.e. C-total, total-N, P available, exchangeable K, and humic and fulvic acid. The application of chicken manure effective to reduce NPK fertilizer need.  The best yield was found in using 50% of NPK fertilizer to dosage recommendation and 50% application of chicken manure to dosage 20 Mg ha^-1.