headland micronutrients
DESCRIPTION
HEADLAND MICRONUTRIENTS. PLANTS CAN ONLY ACCEPT NUTRIENTS IN SOLUTION. DIFFERENT SALTS HAVE VARYING LEVELS OF SOLUBILITY. NITRATES SULPHATES HYDROXIDES OXIDES CARBONATES. Increasing Solubility. Increasing Plant Availability. HEADLAND MICRONUTRIENTS. SOLUBILITY OF MAGNESIUM SALTS - PowerPoint PPT PresentationTRANSCRIPT
HEADLAND MICRONUTRIENTS
PLANTS CAN ONLY ACCEPT NUTRIENTS IN SOLUTION
DIFFERENT SALTS HAVE VARYING LEVELS OF SOLUBILITY
NITRATES
SULPHATES
HYDROXIDES
OXIDES
CARBONATES
Increasing SolubilityIncreasing Plant Availability
HEADLAND MICRONUTRIENTS
SOLUBILITY OF MAGNESIUM SALTS
Mg(OH)2 0.005 ppm
MgSO4 50 ppm
MgNO3 80 ppm
HEADLAND MICRONUTRIENTS
Trials on Headland Nitrates
CMI 1994 Mg tissue levels after Mg application SAC 1995 Mn tissue levels after Mn application Harper Adams 1995 Mn tissue levels Agronomic Research Mn in Spring Oats 1996 JAR Geelen Research 1996 in Apples Cropcare Mn in Sugar Beet 1997 Levington Mn in Winter Barley 1999
Mn Tissue Levels - Nitrates v Carbonates
0
50
100
150
200
250
Mnppm
pre T1
3 DAT 7 DAT 14DAT
21DAT
28DAT
ppm
Val
ues Headland
JettHeadlandClassicHeadlandChoiceUntreated
Levington Agriculture 1999 on Winter Barley
Pre T1 Mn ppm = 17.3
Significant differences between UT, nitrates and carbonate Mn
ppm Mn DAT
19
45 45
211919
60
51
211919 19
23
17
0
10
20
30
40
50
60
70
ppm 0 DAT ppm 3 DAT ppm 7DAT ppm 14 DAT ppm 21 DAT
ppm
Mn
Manganese 500 g/ha Headland Jett 500 g/ha Untreated
HAC 1995
Winter Barley Trial
Effect of Micronutrient Source on Yield
6.3
6.44
6.77
6 6.2 6.4 6.6 6.8 7
Untreated
500 g MnSulphate
400 g Mn Nitrate
Yield of Winter Barley t/ha
Trial at Harper Adams College, 1995
Effect of Micronutrient Source on Yield
6.3
6.44
6.77
6 6.2 6.4 6.6 6.8 7
Untreated
500 g MnSulphate
400 g Mn Nitrate
Yield of Winter Barley t/ha
Trial at Harper Adams College, 1995
“At 400 g/ha Jett gave significantly greater yield than untreated, whereas Mn Sulphate was not significantly different from untreated”
“Since there were no differences in Mn content between Mn sulphate and Jett it is difficult to explain the better performance of Jett at 400 g/ha”