### 抄録

This study was conducted to present a new equation for analyzing the decrease in dry matter digestibility [DDMD] with growth of forage, and to relate it and the previous equation analyzing DDMD (Shimojo et al., 1998b). The following equation showed the relationship between two equations, namely, the new equation on the left-hand side and the changed form of the previous equation on the right-hand side. D_{1}/W_{1} · [1 - exp {(RGR_{d} - RGR_{w}) · (t_{2} - t_{1})}] = (1 - W_{1}/W_{2}) · (D_{1}/W_{1} - RGR_{d}/RGR_{w} · D/W), (A) where W = dry weight of forage (W_{1} ≠ W_{2}), D = dry weight of digestible materials (D_{1} ≠ D_{2}), RGR_{w} = mean relative growth rate of forage, RGR_{d} = mean relative growth rate of D, (1 - W_{1}/W_{2}) = forage growth index [FG index], {D_{1}/W_{1} - (RGR_{d}/RGR_{w}) · (D/W)} = a changed form of DDMPD index (DDMPD index: index for the decrease in dry matter partition into D). The following results were obtained: Equation (A) showed that DDMD was expressed using RGR_{d} and RGR_{w} as main factors in either of two different-type equations. It was suggested that there was a new equation analyzing DDMD, and using the new and previous equations some information was obtained for the change in dry matter digestibility with growth of forages.

元の言語 | 英語 |
---|---|

ページ（範囲） | 373-376 |

ページ数 | 4 |

ジャーナル | Journal of the Faculty of Agriculture, Kyushu University |

巻 | 42 |

発行部数 | 3-4 |

出版物ステータス | 出版済み - 3 1 1998 |

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### All Science Journal Classification (ASJC) codes

- Biotechnology
- Agronomy and Crop Science

### これを引用

*Journal of the Faculty of Agriculture, Kyushu University*,

*42*(3-4), 373-376.

**Two Different-Type Equations Analyzing Decrease in Dry Matter Digestibility with Growth of Forages.** / Shimojo, Masataka; Bungo, Takashi; Imura, Yoshimi; Tobisa, Manabu; Koga, Naoki; Tao, Shao; Yunus, Muhammad; Yin, Zhao; Nakano, Yutaka; Goto, Ichiro; Masuda, Yasuhisa.

研究成果: ジャーナルへの寄稿 › 記事

*Journal of the Faculty of Agriculture, Kyushu University*, 巻. 42, 番号 3-4, pp. 373-376.

}

TY - JOUR

T1 - Two Different-Type Equations Analyzing Decrease in Dry Matter Digestibility with Growth of Forages

AU - Shimojo, Masataka

AU - Bungo, Takashi

AU - Imura, Yoshimi

AU - Tobisa, Manabu

AU - Koga, Naoki

AU - Tao, Shao

AU - Yunus, Muhammad

AU - Yin, Zhao

AU - Nakano, Yutaka

AU - Goto, Ichiro

AU - Masuda, Yasuhisa

PY - 1998/3/1

Y1 - 1998/3/1

N2 - This study was conducted to present a new equation for analyzing the decrease in dry matter digestibility [DDMD] with growth of forage, and to relate it and the previous equation analyzing DDMD (Shimojo et al., 1998b). The following equation showed the relationship between two equations, namely, the new equation on the left-hand side and the changed form of the previous equation on the right-hand side. D1/W1 · [1 - exp {(RGRd - RGRw) · (t2 - t1)}] = (1 - W1/W2) · (D1/W1 - RGRd/RGRw · D/W), (A) where W = dry weight of forage (W1 ≠ W2), D = dry weight of digestible materials (D1 ≠ D2), RGRw = mean relative growth rate of forage, RGRd = mean relative growth rate of D, (1 - W1/W2) = forage growth index [FG index], {D1/W1 - (RGRd/RGRw) · (D/W)} = a changed form of DDMPD index (DDMPD index: index for the decrease in dry matter partition into D). The following results were obtained: Equation (A) showed that DDMD was expressed using RGRd and RGRw as main factors in either of two different-type equations. It was suggested that there was a new equation analyzing DDMD, and using the new and previous equations some information was obtained for the change in dry matter digestibility with growth of forages.

AB - This study was conducted to present a new equation for analyzing the decrease in dry matter digestibility [DDMD] with growth of forage, and to relate it and the previous equation analyzing DDMD (Shimojo et al., 1998b). The following equation showed the relationship between two equations, namely, the new equation on the left-hand side and the changed form of the previous equation on the right-hand side. D1/W1 · [1 - exp {(RGRd - RGRw) · (t2 - t1)}] = (1 - W1/W2) · (D1/W1 - RGRd/RGRw · D/W), (A) where W = dry weight of forage (W1 ≠ W2), D = dry weight of digestible materials (D1 ≠ D2), RGRw = mean relative growth rate of forage, RGRd = mean relative growth rate of D, (1 - W1/W2) = forage growth index [FG index], {D1/W1 - (RGRd/RGRw) · (D/W)} = a changed form of DDMPD index (DDMPD index: index for the decrease in dry matter partition into D). The following results were obtained: Equation (A) showed that DDMD was expressed using RGRd and RGRw as main factors in either of two different-type equations. It was suggested that there was a new equation analyzing DDMD, and using the new and previous equations some information was obtained for the change in dry matter digestibility with growth of forages.

UR - http://www.scopus.com/inward/record.url?scp=0032372728&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0032372728&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0032372728

VL - 42

SP - 373

EP - 376

JO - Journal of the Faculty of Agriculture, Kyushu University

JF - Journal of the Faculty of Agriculture, Kyushu University

SN - 0023-6152

IS - 3-4

ER -