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.
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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 -