Publication Date
1989
Description
There are two practical ways to apply phosphorus (P) fertilizer on cutting type grasslands in Hokkaido, Japan. The first one is to apply P at a rate of about I 00 kg P2Os/ha in the spring (April) in one application. Some reasons for this method have been explained (Hayakawa et al., 1951). However, in some cases, it is more convenient for practical management to apply three equal amounts of P, at three different times during the year (April, June and August) the same as other fertilizers such as nitrogen or potassium. That is a second way. Grassland soil is acidified generally from the surface layer of the soil. The basis of this acidification is explained by the leaching of exchangeable cation (mostly Ca2+ ) as a result of the anion behavior of the fertilizers applied (Hojito et al., 1983). Such acidification usually results in the reduction of yield and P content in grasses. Therefore, when good productivity as a result of an intensive management practice is demanded as they are in Japan, acidification linked with P nutrition of the grasses is an inevitable problem. Therefore, when considering an effective P application method, soil acidification and P fertility of the soil should be taken into account. This paper reports on the relations between P application timing and soil chemical condition such as pH or P fertility.
Citation
Hojito, M; Nishimune, A; and Noshiro, M, "An Effective P Application Method for Dactylis glomerata" (2025). IGC Proceedings (1989-2023). 16.
https://uknowledge.uky.edu/igc/1989/session1/16
Included in
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An Effective P Application Method for Dactylis glomerata
There are two practical ways to apply phosphorus (P) fertilizer on cutting type grasslands in Hokkaido, Japan. The first one is to apply P at a rate of about I 00 kg P2Os/ha in the spring (April) in one application. Some reasons for this method have been explained (Hayakawa et al., 1951). However, in some cases, it is more convenient for practical management to apply three equal amounts of P, at three different times during the year (April, June and August) the same as other fertilizers such as nitrogen or potassium. That is a second way. Grassland soil is acidified generally from the surface layer of the soil. The basis of this acidification is explained by the leaching of exchangeable cation (mostly Ca2+ ) as a result of the anion behavior of the fertilizers applied (Hojito et al., 1983). Such acidification usually results in the reduction of yield and P content in grasses. Therefore, when good productivity as a result of an intensive management practice is demanded as they are in Japan, acidification linked with P nutrition of the grasses is an inevitable problem. Therefore, when considering an effective P application method, soil acidification and P fertility of the soil should be taken into account. This paper reports on the relations between P application timing and soil chemical condition such as pH or P fertility.
