Влияние магниевых удобрений НА ДИНАМИК КИСЛОТНОСТИ И МИНЕРАЛЬНЫХ ФОСФАТОВ ДЕРНОВО-ПОДЗОЛИСТОЙ ПОЧВЫ ПРИ ОПТИМАЛЬНОМ И ИЗБЫТОЧНОМ УВЛАЖНЕНИИ
Table 1 - Content of mobile phosphates depending on soil moisture when applying ammophos and magnesium sulfate
Experimental variant | by method Kirsanov | by method Olsen |
P2O5 mg/kg soil | ||
Optimal conditions for water supply to plants (60% of total moisture capacity) | ||
Control (without fertilizers) | 25 | 12 |
Ammophos (1/3 dose) | 79 | 70 |
Ammophos (1/3 dose)+ MgSО4 | 90 | 71 |
Ammophos (1 dosedose) | 411 | 258 |
Ammophos (1 dose)+ MgSО4 | 389 | 235 |
Ammophos (2 dose) | 695 | 503 |
Ammophos (2 dose)+ MgSО4 | 719 | 521 |
*Least Significant difference05 | 20 | 15 |
Soil flooding (120 % of total moisture capacity) | ||
Control (without fertilizers) | 32 | 11 |
Ammophos (1/3 dose) | 103 | 55 |
Ammophos (1/3 dose)+ MgSО4 | 104 | 59 |
Ammophos (1 dosedose) | 361 | 198 |
Ammophos (1 dose)+ MgSО4 | 365 | 200 |
Ammophos (2 dose) | 556 | 344 |
Ammophos (2 dose)+ MgSО4 | 652 | 381 |
*Least Significant difference05 | 19 | 10 |
*least Significant difference05 is calculated taking into account all options except the control one