Page 3 - การจัดการดินเปรี้ยวจัดที่เหมาะสมเพื่อความเป็นประโยชน์ของธาตุอาหารพืชต่อการผลิตของปาล์มน้ำมันที่ปลูกในจังหวัดพัทลุง Appropriate management of acid sulfate soil to increasing the availableof plant nutrient with for manufacture on oil palm in Phattalung

ห้องสมุดกรมพัฒนาที่ดิน

Abstract

Appropriate management of acid sulfate soil to increasing the availableof plant
nutrient with for manufacture on oil palm in Phattalung province on October 2017 to
September 2020. The consists of 3 sub-projects were 1) Effect of using organic fertilizer with
dolomite for oil palm growth on acid sulfate soil in Phattalung province 2) Effect of using bio
fertilizer and reduce chemical fertilizer rate to increasing on oil palm in acid sulfate soil at
Phattalung province 3) Effect of using bio fertilizer and high-quality fertilizer with to the size
and weight of oil palm fruit bunches in acid sulfate soil at Phattalung province. This research
has guidelines for managing acid sulfate soil. By using dolomite adjust soil reaction and

increasing the fertility of the soil by biotechnology of Land Development Department
such as liquid fertilizer LDD2, compost integrated with microbial super LDD9, bio-fertilizer super
LDD12, manure, high-quality organic fertilizers with reducing the use of chemical fertilizers
to increase the productivity and potential of acid sulfate soil for the growth of oil palm,
reduce production costs and increase economic returns. This will be used as a practice
to expand results to farmers in the area of acid sulfate soil further. The study was able

to divide the management according to the age of the oil palm, oil palm aged 1–3 years, using
dolomite according to lime requirement combined with chemical fertilizer in the half rate of the
recommended by Department of Agriculture (DOA) and compost integrated with microbial super
LDD.9 rate of 3 kg per plant. There was the best way That gave the oil palm the highest yield
in the first year, which was 1,377.20 kg per rai. When the oil palm begins to yield (3-5 years
old), using dolomite according to lime requirement combined with chemical fertilizer in 30% of rate
the recommended by DOA and bio-fertilizer super LDD12 rates of 15 kg per plant. There was the
best way to produce large amounts of oil palm. Fresh weight and yield were the highest at
15.86 bunches per plant per year and 3,392.64 kilograms per rai per year, respectively. Over 5
years of age, should be managed by using dolomite according to the lime requirement (LR),
with chemical fertilizers in the half the rate of soil analysis and bio-fertilizer super LDD12 rates

of 10 kg per plant. There have average circumference of bunches, fresh weight per bunch and
the highest yield weight per rai. The mean circumference of oil palm bunches was 91.72
centimeters, live weight per bunch was 11.9 kilograms, and oil palm yield was 3,215.29
kilograms per rai per year, respectively.

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

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