CHANGES IN DISTRIBUTION OF BANANA (MUSA AAA CV. VALERY) ROOTS WITH PLANT HEIGHT, DISTANCE FROM THE PSEUDOSTEM AND SOIL DEPTH
The distribution of roots in banana (Musa AAA cv. Valery) was determined on a sandy clay loam in Costa Rica. Samples were taken from soil blocks at distances of 0 to 30, 30 to 60, and 60 to 90 cm from the pseudostem, 0 to 120 cm depth using intervals of 15 cm, and from plants that were 120, 150, 180 or 210 cm high (non- flowering), plus a set from flowering plants. Plant height and the horizontal distance from the pseudostem did not affect the percentage of fresh root weight. In contrast, there was a significant (P= 0.0001) effect of soil depth, and also a significant (P= 0.0006) interaction between soil depth and horizontal distance from the pseudostem, on the percentage of fresh root weight. For the three distances from the pseudostem, the percentage of root weight decreased sharply with soil depths. Independently of the distance from the pseudostem, all plants showed the highest root weight in the top 15 cm of the soil (40.1%). Above 65.1% of the total root weight was found in the upper 30 cm of the soil. More than 79.4% and 88.1% of the roots were detected in the first 45 and 60 cm of the soil profile at any plant height, respectively. The total fresh root weight in the excavated area (0–90 cm from the stem and 0–120 cm depth) was 1.16, 0.97, 1.14, 1.50, and 1.22 Kg in the plant heights of 120, 150, 180, and 210 cm, and flower stalk emergence plants, respectively. Additional studies of root stratification pattern are necessary for a better understanding of the interaction between cultural practices and crop yield.
Araya, M., Vargas, A. and Cheves, A. (1998). CHANGES IN DISTRIBUTION OF BANANA (MUSA AAA CV. VALERY) ROOTS WITH PLANT HEIGHT, DISTANCE FROM THE PSEUDOSTEM AND SOIL DEPTH. Acta Hortic. 490, 201-210
Horizontal distance, Musa AAA, plant height, root distribution, soil depth