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Abstract ▼ AI-Helper

A mulberry field and 3 graftage nurseries in Puyo were flooded for 2 to 5 days in 1987 to investigate flood damage. The effect of fertilization upon fall yield in previously flood fields was also studied. The results were : 1. Graftage which received 2 days of flood were alive with decaying leaves s...

A mulberry field and 3 graftage nurseries in Puyo were flooded for 2 to 5 days in 1987 to investigate flood damage. The effect of fertilization upon fall yield in previously flood fields was also studied. The results were : 1. Graftage which received 2 days of flood were alive with decaying leaves submerged under water. Graftages submerged completely for 5 days died, whereas those whose top appeared above the water lived. Graftages which were knocked down by water and scratched by sand, following washing by a fire engine, died. 2. Mulberry trees flooded for 5 days were alive when tops were above the water. 3. Mud soil carried by the flood and deposited on the mulberry had a pH of 6.43, organic matter 2.4%, and available phosphorus of 124ppm. The original sandy soil of the mulberry field had a pH of 5.52, organic matter 0.3%, and available phosphorus of 467ppm. Mud, as a clayey soil with higth fertility, may play a role in soil building. 4. Mulberry from the flooded field showed 3.4% higher yield with additional fertilization than no fertilization. This suggests nitrogen a mobile element, was lost in the flood.