Efficiency of Integrated Nutrient Management to Improve Eggplant Production in Intercropping Systems
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Faculty of Agriculture, Universitas Brawijaya, Malang, East Java, Indonesia
State Agricultural Polytechnic of Kupang, Indonesia
Faculty of Agriculture, University of Islam Malang, East Java, Indonesia
Mochammad Dawam Maghfoer   

Faculty of Agriculture, Universitas Brawijaya, Malang, East Java, Indonesia
J. Ecol. Eng. 2022; 23(11):217–227
Eggplant is a vegetable that is widely cultivated in Indonesia. Fertilization is one of the most influential factors to increase eggplant productivity. Research to improve eggplant productivity through the application of various nitrogen nutrient sources in an integrated nutrient management system and an intercropping system with cabbage was carried out from June to December 2019 in Wonorejo, Poncokusumo-Malang. The study was conducted using a randomized block design (RBD) with 21 treatments and was repeated 3 times. The treatments were D0 = Control (180 kg N) and (D1 - D20), were various combinations of inorganic N fertilizers, manure, microbes (EM and PGPR). Observations included the number of leaves and stem diameter of eggplant, number of cabbage leaves, number of fruit per plant, fruit weight (per plant, per hectare and per fruit), Land Equivalent Ratio (LER), soil analysis before and after the research. The results showed, the combination of 75% inorganic fertilizer + 20-30 t ha-1 manure + 10 - 20 ml l-1 microbe (EM / PGPR) in the eggplant - cabbage intercropping system increased the growth and yield of eggplant, with fruit weights ranging 1.86 - 2.35 kg plant-1 or 40.88 - 53.17 t ha-1, and LER value was 1.94 - 2.04.