Effects Of Calcium Mud And Magnesium Mud Cooperated With Peat And Inorganic Fertilizers On Two Soils And Corn Growth

A greenhouse pot experiment was conducted to study the effects of calcium mud and magnesium mud combined with peat and inorganic fertilizers on the physical and chemical properties and nutrient contents of calcareous cinnamon soil and Guangzhou vegetable garden soil and on the growth and nutrient content of corn in upper ground part and under ground part. The results showed that:(1) The pH value, electrical conductivity, organic matter, total nitrogen, available phosphorus, and available potassium of the two soils in different fertilizer treatments were greater than that in treatment CK. The difference of soil available potassium was not significant between the fertilization treatments and CK in calcareous cinnamon soil. The pH value and salt content of calcareous cinnamon soil were the highest in the treatments of P1+Ca6+W and P1+Mg6+W and the contents of organic matter, total nitrogen, and available phosphorus of calcareous cinnamon soil were the highest in treatments of P4+Ca3+W and P4+Mg3+W. The pH value and salt content of Guangzhou vegetable garden soil were the highest in the treatments of Pl+Ca6+W and P1+Mg6+W and the contents of organic matter, total nitrogen, and available phosphorus of Guangzhou vegetable garden soil were the highest in the treatments of P4+Ca3+W and P4+Mg3+W.(2) The plant height, plant dry weight, chlorophyll, leaf total nitrogen, leaf total phosphorus, and leaf total potassium of corn in different fertilization treatments were greater than that in treatment CK on the two soils. The plant dry weight of corn in fertilization treatments was similar to that in treatment CK on the calcareous cinnamon soil. The plant height, chlorophyll, leaf total nitrogen, total phosphorus, and total potassium of corn were all the highest in the treatments of P4+Ca3+W and P4+Mg3+W on the calcareous cinnamon soil, the plant height, plant dry weight, chlorophyll, leaf total nitrogen, total phosphorus, and total potassium of corn were all the highest in the treatments of P4+Ca3+W and P4+Mg3+W on the Guangzhou vegetable garden soil.(3) The root dry weight, root total nitrogen, root total phosphorus, and root total potassium of corn in different fertilization treatments were greater than that in treatment CK on the two soils. The difference of root total phosphorus between fertilization treatment and treatment CK was not significant on calcareous cinnamon soil, but the root dry weight, root total nitrogen, and root total potassium of corn were the highest in treatments of P4+Ca3+W and P4+Mg3+W. The root dry weight, root total nitrogen, root total phosphorus, and root total potassium of corn were the highest in treatments of P4+Ca3+W and P4+Mg3+W on Guangzhou vegetable garden soil.(4) In the test of the fertilization treatments, at the point of improving soil physical and chemical properties, the pH value and salt content significantly increased in the treatments of P1+Ca6+ W and P1 +Ca6+W on the two kinds of soil, the calcium mud and magnesium mud can be used as modifier in Acidic soil, but does not suitable for calcareous soil. From the soil nutrient content and growth and nutrient content of corn plant, the treatments of P4+Ca3+W and P4+Mg3+W are the best on the two kinds of soil, so calcium mud and magnesium mud can raise the content of the soil nutrient, accelerate the growth and nutrient absorption of corn.