Spatial Distribution of Cattle Urine Excretion and Urine Nutrients on a Sloping Pasture

DOI JASI Web Site 28 References
  • Yamada Daigo
    Miyota Research Station, NARO Institute of Livestock and Grassland Science
  • Higashiyama Masakazu
    Miyota Research Station, NARO Institute of Livestock and Grassland Science:(Present office)NARO Tohoku Agricultural Research Center
  • Yamaguchi Manabu
    Miyota Research Station, NARO Institute of Livestock and Grassland Science:(Present office)NARO Tohoku Agricultural Research Center
  • Shibuya Takeshi
    Miyota Research Station, NARO Institute of Livestock and Grassland Science:(Present office)Nasu Research Station, NARO Institute of Livestock and Grassland Science
  • Shindo Kazumasa
    Miyota Research Station, NARO Institute of Livestock and Grassland Science:(Present office)Nasu Research Station, NARO Institute of Livestock and Grassland Science
  • Tejima Shigeki
    Miyota Research Station, NARO Institute of Livestock and Grassland Science

Bibliographic Information

Other Title
  • 傾斜放牧草地における牛の排尿と尿由来養分の空間分布
  • ケイシャ ホウボク クサチ ニ オケル ウシ ノ ハイニョウ ト ニョウ ユライ ヨウブン ノ クウカン ブンプ

Search this article

Abstract

In order to contribute to rationalization fertilizer application on pasture, we investigated urine excretions in each 10-m square mesh on the sloping pasture (1.5 ha) and calculated urine nutrients according to the number of the urine excretions and urine nutrient content. The annual average urine excretion was negatively correlated with the slope and positively correlated with the relative altitude of the pasture. An intersecting straight line model between the urine excretions and slope showed that the point of intersection was at 10.7°. The urine excretions around the fence and shelter woods were significantly larger than that in the meshes in which grazing facilities were not included (p <0.05). Multiple regression analysis showed that the annual average urine excretions was affected by the presence of more than two adjoined mesh with slopes of 10.7° or less, relative altitude and fence. In 84% of the area of the pasture, urine supplied N and K_2O in quantities that were more than 25% of the fertilizer levels (120 and 30kg/ha of N and K_2O, respectively). The percentages of areas in which urine supplied excess N and K_2O as compared to the fertilizer levels were 29% and 84%, respectively. Potassium fertilizer level on the pasture was originally determined to be lower than that on grassland in the region in view of excretion potassium accumulation to soil. The percentage of areas in which urine supplied excess K_2O as compared to the levels (100-120 kg/ha) in grassland were 29%. These results of urine nutrients were similar to results of excretion nutrients calculated according to dung (Yamada et al. 2011) and urine nutrients. These results indicate that the use of nitrogen and potassium fertilizer can be reduced in wide areas with gentle slope, areas at relatively high altitude and areas around fence.

Journal

References(28)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top