Nitrogen Budgets on a Pasture under Combined Utilization of Grazing and Cutting

Presenter Information

Y. Kurokawa, Tokyo University of Agriculture and Technology, Japan
S. Yamamoto, Tokyo University of Agriculture and Technology, Japan
Y. Iijima, Tokyo University of Agriculture and Technology, Japan
M. Kitagawa, Tokyo University of Agriculture and Technology, Japan
F. Omata, Tokyo University of Agriculture and Technology, Japan
S. Sakamoto, Tokyo University of Agriculture and Technology, Japan
H. Tanaka, Tokyo University of Agriculture and Technology, Japan
S. Suzuki, Tokyo University of Agriculture and Technology, Japan
T. Shioya, Tokyo University of Agriculture and Technology, Japan

Description

Nitrogen budgets on a pasture being utilized for both grazing and cutting were investigated. A pasture containing tallfescue, orchard grass and white clover was divided into two areas: initially grazed (IA, 0.41ha) and grazed after cutting for hay (BA, 0.49ha). A herd of 4-5 cattle (heifers or steers of Japanese Black or Holstein) grazed at IA from 22 Apr. to 2 Jul. and grazed at both IA and BA from 3 Jul. to 21 Oct. 1999. The amount of N grazed from IA was 3 times higher than the sum of N of grazed herbage and harvested hay from BA. The amount of N inflow to soil as fertilizer or animal excreta seemed to relate to the difference in herbage production between IA and BA. The value of N surplus for the whole pasture was very similar to the value of the difference between inflow to soil and the sum of grazed herbage and harvested hay. N surplus in the pasture seemed to relate closely to soil N balance.

Citation

Kurokawa, Y.; Yamamoto, S.; Iijima, Y.; Kitagawa, M.; Omata, F.; Sakamoto, S.; Tanaka, H.; Suzuki, S.; and Shioya, T., "Nitrogen Budgets on a Pasture under Combined Utilization of Grazing and Cutting" (2021). IGC Proceedings (1993-2023). 12.
https://uknowledge.uky.edu/igc/19/4/12