Влияние магниевых удобрений НА ДИНАМИК КИСЛОТНОСТИ И МИНЕРАЛЬНЫХ ФОСФАТОВ ДЕРНОВО-ПОДЗОЛИСТОЙ ПОЧВЫ ПРИ ОПТИМАЛЬНОМ И ИЗБЫТОЧНОМ УВЛАЖНЕНИИ
Table 1 - The effect of magnesium sulfate application on the acidity indices of sod-podzolic soil depending on soil moisture conditions
Experimental variant | pH of salt extract | Hydrolytic acidity, mg-eq./100 g of soil |
Optimal conditions for water supply to plants (60% of total moisture capacity) | ||
Control (without fertilizers) | 4.12 | 4.60 |
Ammophos (1/3 dose) | 4.20 | 5.30 |
Ammophos (1/3 dose)+ MgSО4 | 6.61 | 1.15 |
Ammophos (1 dose) | 4.13 | 5.29 |
Ammophos (1 dose)+ MgSО4 | 6.82 | 1.13 |
Ammophos (2 dose) | 4.23 | 5.22 |
Ammophos (2 dose)+ MgSО4 | 6.80 | 1.05 |
Least Significant difference05 | 0.25 | 0.18 |
Soil flooding (120 % of total moisture capacity) | ||
Control (without fertilizers) | 4.21 | 4.64 |
Ammophos (1/3 dose) | 4.18 | 4.72 |
Ammophos (1/3 dose)+ MgSО4 | 6.57 | 0.92 |
Ammophos (1 dosedose) | 4.23 | 4.79 |
Ammophos (1 dose)+ MgSО4 | 6.78 | 1.29 |
Ammophos (2 dose) | 4.49 | 4.85 |
Ammophos (2 dose)+ MgSО4 | 6.76 | 1.15 |
Least Significant difference05 | 0.27 | 0.18 |