Doses and Timing of 2, 4-D Application for Broadleaf Weed Control, Botanical Compositions, Productivity, and Nutritive Value of Natural Pasture
Table 12
Effect of dose and time of application of 2, 4-D herbicide on crude protein and in vitro dry matter digestibility yield (t·ha−1) of forage portion (grasses + legumes).
Factors (2, 4-D herbicide doses and time of application)
CPY
IVDDMY
1st year
2nd year
Mean
1st year
2nd year
Mean
Doses
0 L·ha−1 (control)
0.34
0.28
0.31
2.31
1.85
2.08
1 L·ha−1
0.30
0.37
0.34
1.90
2.36
2.13
1.5 L·ha−1
0.32
0.34
0.33
2.02
2.10
2.06
2 L·ha−1
0.28
0.42
0.34
1.88
2.78
2.30
-value
0.53
0.35
0.93
0.20
0.06
0.60
Time
Control
0.34
0.28
0.31
2.31
1.85
2.08
Mid-July
0.33
0.39
0.36
2.02
2.33
2.18
Early August
0.28
0.38
0.33
1.89
2.64
2.27
Mid-August
0.30
0.35
0.32
1.88
2.21
2.04
-value
0.40
0.57
0.70
0.20
0.20
0.65
RT
ns
ns
ns
ns
ns
ns
Mean
0.31
0.36
0.33
1.97
2.34
2.15
CV
23.99
33.88
31.09
17.43
25.62
25.92
1st year = 2019, 2nd year = 2020, CPY = crude protein yield, IVDDMY = in vitro digestible dry matter yield, RT = dose and time interaction, RT = dose and time interaction.
