Page 8 - ผลของเถ้าไม้ยางพาราต่อความเป็นประโยชน์ของธาตุอาหารพืชในดินกรดเพื่อการปลูกอ้อยคั้นน้ำ Effect of rubber wood ash to nutrient profitability in acids soil for juicing sugarcane.

ห้องสมุดกรมพัฒนาที่ดิน

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Abstract

The effect of rubber wood ash on Suphanburi 50 juicing sugarcane plants grown

in acidic soil, Phatthalung soil series (Ptl : series), soil group 6, was conducted in a farmer

plot in Moo 4, Kamphaeng Phet Subdistrict, Rattaphum District, Songkhla Province during

the period, October 2018 - September 2020 by planning an RCBD (Randomized Complex

Block Design) experiment with 8 recipes, 4 repetitions as follows: Recipe 1 (T1) : Farmer's

Method. Recipe 2 (T2) : Chemical fertilizer according to soil analysis formula. Recipe 3

(T3): PD 9 microorganisms at the rate of 100 kg/rai. Recipe 4 (T4) : Dolomite lime

according to the mortar requirement. Recipe 5 (T5) : Rubber wood ash at the rate of 600

kgs/rai. Recipe 6 (T6) : Rubber wood ash at the rate of 900 kgs/per rai. Recipe 7 (T7) :

Rubber wood ash at the rate of 1,200 kgs/rai. Recipe 8 (T8) : Rubber wood ash at the rate

of 1,500 kgs/rai

Using rubber wood ash Improve soil acidity affects the growth and productivity

of juicing sugarcane. The chemical properties of the soil after the experiment have

changed as follows, Increased pH, the amount of organic matter was slightly decreased.

The amount of phosphorus, potassium and calcium increased. The amount of magnesium

had changed very little.

The results showed that method 8 was to add rubber wood ash at the rate of

1,500 kg per rai. It tends to produce the highest yield equal to 18.56 tons per rai. and the

highest economic return equal to 71,290.00 baht per rai, followed by the 6th formula is

to add rubber wood ash at the rate of 1,200 kg per rai, yield 18.25 tons per rai and

provide an agricultural return, the economy is 70,040 baht per rai. The third method is to

apply microorganism compost, PD 9 at the rate of 100 kgs per rai. Juicing Sugarcane

produced the lowest yield and economic return of 9.70 tons per rai and 26,940 baht per

rai respectively.