土壤供钾能力与钾素平衡的研究

POTASSIUM SUPPLY CAPABILITY FROM SOIL AND POTASSIUM BALANCE

在不同的供钾地块上,通过田间试验研究不同作物的需钾水平。结果表明,在土壤速效钾为70 mg/kg的地块上,施用钾素化肥有一定的增产效果,土壤含钾量越低,施钾的增产效果越明显,在玉米、小麦等禾本科作物上增产尤为明显。试验土壤上,每667m2施用有机肥3000kg并施钾素6.23kg,可以补偿土壤中钾的亏损,达到钾素平衡。

In the different potassium plots, the field experiment by different creps. When soil available potassium in 70 mg/kg in to find out the need of different potassium levels the land, application of potassium fertilizer could increase the yield. Soil potassium content is lower, potassium stimulation effect is more obvious,. In maize, wheat and other gramineous crop production is obvious. The test also showed that adding of 3000 kilograms of organic fertilizer and potassium 6.23 kg per 667 m2, which can compensate the soil potassium loss and achieve the bal- ance of potassium.