Year: 1981
Type: article
Abstract: Two methods of injecting phosphorus into the trunks of citrus trees, which we termed the “ringer-injection method” and the “pressure-injection method”, were studied using 14-year-old satsuma mandarin trees.1. Only abut 60ml of a 0.1M-KH232PO4 solution was incorporated into a tree after 30 days by the ringer-injection method. Five hundred and twenty milliliters of a 0.1M-KH232 PO4 solution were pressure-injected by application of 5kg/cm2 for 3 days, and 750_??_1, 000ml of a 0.2M-KH2PO4 solution were injected by application of 10kg/cm2 for about 1 day, in field tests.2. The phosphorus concentration in the pulp and leaves of the tree injected with 0.1M-KH232PO4 by application of 5kg/cm2 for 3days respectively increased by 7% and 64% after 1 week. However, 8 weeks later, the phosphorus concentration in the pulp had increased by 19%, while that in the leaves had decreased to 43%.3. The phosphorus concentration in the leaves of the trees injected with 0.2M-KH2PO4 by application of 10kg/cm2 for about 1 day increased by 113% after 1_??_2 weeks.
DOI: 10.2503/jjshs.49.534
Authors: Shoichiro AKAO, Sadao TSUKAHARA
Language: English
Subfield: Plant Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: diamond
OpenAlex ID: W2026742003