Page 4 - ผลการใช้ปุ๋ยอินทรีย์ร่วมกับปูนโดโลไมท์ต่อการเจริญเติบโตของปาล์มน้ำมันในพื้น ที่ดินเปรี้ยวจัด จังหวัดพัทลุง Effect of using organic fertilizer together with dolomite for growth on oil plam in acid sulfate soil at Phattalung province

ห้องสมุดกรมพัฒนาที่ดิน

ABSTRACT

Effect of using organic fertilizer with dolomite for oil plam growth on acid sulfate soil
in Phattalung province. The objective of this study is appropriate management method of acid
sulfate soil for the growth of oil palm aged 1-3 years. The experiment was conducted in Moo 2,
Pak Phayun Sub-district, Pak Phayun District. Phatthalung Province, for 3 years from 2018-2020. The
experiment was Randomized Completely Block Design (RCBD). Which 9 treatments, 3 replications,
T1: the control according to farmers. T2 using chemical fertilizers recommended by the Department
of Agriculture (DOA). T3: using chemical fertilizers according to soil analysis. T4: using dolomite
according to lime requirement combined with chemical fertilizer in the half rate of the
recommended by DOA and bio-fertilizer super LDD12. T5: using dolomite according to lime
requirement combined with chemical fertilizer in the half rate of the recommended by DOA and
compost integrated with microbial super LDD9. T6: using dolomite according to the lime
requirement with chemical fertilizing at half rate of recommended by soil analysis and bio-fertilizer
super LDD12. T7: using dolomite according to the lime requirement with chemical fertilizing at half
rate of the recommended by soil analysis and compost integrated with microbial super LDD9. T8:
using dolomite according to the lime requirement with manure and bio-fertilizer super LDD12. T9:
using dolomite according to the lime requirement with manure and compost integrated with
microbial super LDD9. The result show that using dolomite according to lime requirement combined
with chemical fertilizer in the half rate of the recommended by DOA and bio-fertilizer super LDD12
or compost integrated with microbial super LDD9 increased the level of soil reaction, soil organic
matter and soil nutrients. T5: using dolomite according to lime requirement combined with chemical
fertilizer in the half rate of the recommended by DOA and compost integrated with microbial super
LDD9 gave the highest yield in the first year, 1,377.20 kg/rai. For the economic returns, oil
palm has just begun to produce so causing negative economic returns or losses. T5: using
dolomite according to lime requirement combined with chemical fertilizer in the half rate of the
recommended by DOA and compost integrated with microbial super LDD9 was provide the best
economic return (Lowest loss). There was a return above the variable costs and the return
above all costs is -572.48 and -756.49 baht per rai, respectively.

Keywords: acid sulfate soil, Chemical Fertilizer, Biotechnology, oil plam

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