International Journal of Forestry Research / 2013 / Article / Tab 4 / Research Article
Effect of Climate Variables on Monthly Growth in Modeling Biological Yield of Araucaria angustifolia and Pinus taeda in the Juvenile Phase Table 4 Coefficients and statistics of the Chapman-Richards equation for monthly production in diameter (
) and height (
) of
Araucaria angustifolia and
Pinus taeda, with (CV) and without (NCV) the inclusion of climate variables.
Period Var. Type Araucaria angustifolia Pinus taeda Equation coefficients IA Syx% Equation coefficients IA Syx%
Year 1
NCV 1.4270 0.1277 0.3903 — — 0.7388 37.84 6.2914 0.1931 0.5888 — — 0.9659 12.99 CV 1.5800 0.0826 0.2401 −0.0101 0.0028 0.6918 36.35 8.4300 0.0946 0.4121 0.0132 −0.0002 0.9602 12.29
NCV 1.0018 0.1292 0.0000 — — 0.6412 35.66 2.1729 0.3392 0.7704 — — 0.9312 18.80 CV 0.9424 0.1449 0.0000 −0.0061 0.0009 0.5218 37.44 2.4700 0.1633 0.5473 0.0219 −0.0006 0.9230 17.83 Year 2
NCV 4.3122 0.0767 0.0929 — — 0.8852 20.87 7.3312 0.1515 0.4863 — — 0.9615 13.46 CV 4.1258 0.0951 0.1221 −0.0030 −0.0002 0.8486 20.27 9.9380 0.0772 0.3407 0.0103
0.9531 12.95
NCV 1.7444 0.3260 0.8309 — — 0.9475 18.83 2.0521 0.4236 0.8678 — — 0.9519 16.91 CV 1.8600 0.3408 0.8361 0.0001 −0.0004 0.9391 18.22 1.8737 0.3193 0.8057 0.0067 0.0004 0.9445 16.18 Year 3
NCV 4.1678 0.1729 0.3941 — — 0.9621 11.85 6.1763 0.1204 0.2201 — — 0.8968 19.52 CV 3.6582 0.1531 0.3720 0.0045 0.0014 0.9496 11.55 10.009 0.0427 0.0115 0.0079 0.0001 0.8657 18.81
NCV 2.0871 0.2560 0.6651 — — 0.9367 17.74 2.0801 0.3654 0.8267 — — 0.9606 14.88 CV 2.0300 0.2295 0.6405 0.0053 0.0001 0.9218 17.27 2.0001 0.2756 0.7514 0.0088 0.0003 0.9545 14.16 Year 4
NCV 4.3914 0.1518 0.4343 — — 0.8858 22.87 5.8306 0.1460 0.3665 — — 0.8723 23.35 CV 3.6196 0.1126 0.3752 0.0129 0.0019 0.8571 22.22 6.6597 0.0892 0.2384 0.0079 −0.0001 0.8389 22.59
NCV 1.6234 0.3489 0.7655 — — 0.9552 14.91 1.9455 0.4129 0.8526 — — 0.9681 13.29 CV 1.5002 0.3805 0.7868 −0.0138 0.0024 0.9449 14.48 1.8104 0.3548 0.8153 0.0061
0.9621 12.83 Year 5
NCV 3.9219 0.1641 0.4436 — — 0.9174 18.93 6.3711 0.0755 0.1949 — — 0.7791 31.66 CV 3.6229 0.1549 0.4270 0.0008 0.0010 0.8959 18.33 6.7998 0.0689 0.1814 0.0041 −0.0006 0.7238 30.71
NCV 1.5641 0.4103 0.8491 — — 0.9509 16.46 1.8148 0.3410 0.8028 — — 0.9191 21.18 CV 2.2466 0.3639 0.8232 0.0138 −0.0068 0.9413 15.89 1.0102 0.1774 0.6259 0.0200 0.0043 0.9066 20.15 Year 6
NCV 4.3932 0.1688 0.4272 — — 0.8365 27.11 3.0697 0.0972 0.1446 — — 0.6992 37.29 CV 4.1163 0.2233 0.5007 −0.0253 0.0025 0.7984 26.09 2.9608 0.1405 0.2554 −0.0062
0.6313 35.91
NCV 1.6546 0.3776 0.8708 — — 0.9467 18.65 1.6395 0.3862 0.8155 — — 0.9296 18.87 CV 1.1100 0.3439 0.8547 0.0143 0.0022 0.9393 17.94 1.4015 0.2735 0.7095 0.0102
0.9181 17.87