Paper ID: 9
THE EFFECT OF ROW PROPORTION OF MAIZE AND SOYBEAN INTERCROPPING ON GROWTH AND YIELD OF COMPONENT CROPS IN SANDY SOIL NORTH LOMBOK, INDONESIA
Wahyu Astiko1*, Ni Made Laksmi Ernawati1, and I Putu Silawibawa2
1 Study Program of Agroecotechnology, Faculty of Agriculture, University of Mataram, Jalan Majapahit No.62, 83125 Mataram, Lombok, Indonesia
2 Department of Soil Science Faculty of Agriculture, University of Mataram, Jalan Majapahit No. 62, 83125 Mataram, Lombok, Indonesia
This study aimed to determine nutrient status, mycorrhiza population, and yields of maize-soybean strip intercropping in sandy soil environments of North Lombok, Indonesia as affected by different row proportions of maize and soybean. The experiment was conducted at Akar-Akar village in Bayan district of North Lombok Indonesia designed with Randomized Block Design with three blocks and five treatments i.e. P1 (2 rows of maize + 2 rows of soybean), P2 (3 rows of maize + 2 rows of soybean), P3 (3 rows of maize + 3 rows of soybean), P4 (4 rows of maize + 2 rows of soybean), P5 (4 rows of maize + 3 rows of soybean). Variables observed were soil nutrient status (N-total and P availability), nutrient uptake (N and P), arbuscular mycorrhizal fungi (AMF) population (colonization and spore counts), vegetative growth (dry weight of root and shoots), and yield (dry cob and pods yield and weight of 1000 grains of maize and soybean). The results show that crops intercropping density of 3 rows of maize:3 rows of soybean maintains a high concentration of N contents in soil and maize until 92 DAS. Increase of one more row from 3 to 4 rows, significantly decreases the weight of maize cobs (3.5-folds), pods (2.3-folds), and 1000 seeds (1-folds). The addition of one row of maize plant density which was originally 3 rows to 4 rows causes a decrease in the weight of dry root biomass and canopy of maize and soybean plants. The root weight and dried shoots of maize fell to 3.5 and 4.5 times and the weight of dried roots of soybeans fell to 1.41 times at the age of 92 days after observing the 4:3 ratio of maize and soybean plants. the results showed that intercropping patterns of 3 rows of maize and 3 rows of soybean (P3) with the addition of 15 tons of cattle manure per hectare and AMF inoculation can increase soil nutrient status of N and, P, plant nutrient sorption (N and P), mycorrhizal development, and yield.