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- Growth, Yield, and Seed Quality of Corn (Zea mays L.) and Soybean...
Growth, Yield, and Seed Quality of Corn (Zea mays L.) and Soybean (Glycine max L.) Merr.) as Affected by Population Density in Row Intercropping
Dissertation Abstract:
Further research on the use of abscisic acid (ABA) needs to be conducted to improve grain yield of drought-susceptible soybean cultivars grown under varying degrees of drought conditions.
A study was conducted from November 1988 to July 1989 at the Central Experiment Station of the University of the Philippines Los Banos (UPLB) to:1) determine the influence of row intercropping of different proportions of corn and soybean on the growth and production performance of corn and soybean; 2) evaluate and compare the seed quality of com and soybean in terms of physical and physiological quality and protein content when grown as intercrop and monoculture; and 3) determine the best combination of com and soybean as an alternative method of seed production.
Intercropping affected growth performance but not the seed quality of soybean. Lower population density of the intercrops produced taller soybeans with longer time to maturity. At a higher population density, soybean yield on a per plant and per hectare basis was higher because there were more nodes and pods per plant. Big seeds tended to contain crude protein content than small seeds.
Plant height, days of tasseling, silking, and maturity of corn were significantly affected by population density of intercrops. Lower\ population density of intercropped corn produced shorter plants which took longer to tassel, silk, and mature; higher seed yield per plant because of the higher number of seeds per ear but lower seed yield per hectare; and a tendency to develop big seeds. Big seeds of corn tended to contain higher crude protein than small seeds. No other physical and physiological quality was affected by intercropping.
Higher population of soybean plants in the intercrop resulted in higher land equivalent ratio (LER). Intercropping one row of corn with four rows of soybean and two rows of corn and three rows of soybean gave better LER than monocrop, the values of which were greater than 1.