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โครงการหนังสืออิเล็กทรอนิกส์ด้านการเกษตร เฉลิมพระเกียรติพระบาทสมเด็จพระเจ้าอยู่หัว

ผลของปุ๋ยอินทรีย์ต่อความเป็นประโยชน์ของไนโตรเจนในดิน

Effect of Organic Fertilizer on the Usefulness of Nitrogen in Soil

พีรพงษ์ เชาวนพงษ์ ศรีสุดา รื่นเจริญ ปฏิมาภรณ์ จินจาคาม อนุสรณ์ เทียนศิริฤกษ์
1
ทิพวรรณ แก้วหนู กมลชนก เจริญศรี นงลักษ์ ปั้นลาย
Peerapong Chaovanapong Srisuda Ruencharoen Patimaporn Jinjakam Anusorn Tiensiriroek
1
Tipawan Kaewnoo Kamolchanok Charoensri Nongluck Panlai
กลุ่มวิจัยปฐพีวิทยา กองวิจัยพัฒนาปัจจัยการผลิตทางการเกษตร

ABSTRACT
Effect of organic fertilizer on the usefulness of nitrogen in soil by planting sweet corn. First
year in clay loam at Lopburi Seed Multiplication Center, Lop Buri Province, in RCB experimental designed
was planned with 4 replications 7 treatments. The result showed chemical fertilizer rate 20-5-5 N-P 2O 5-

K 2O kg/rai with organic fertilizer 350 kg dry weight/rai was highest yield followed by chemical fertilizer
rate 20-5-5 N-P 2O 5-K 2O kg/rai, chemical fertilizer rate 15-5-5 N-P 2O 5-K 2O kg/rai with organic fertilizer 350
kg dry weight/rai and chemical fertilizer rate 10-5-5 N-P 2O 5-K 2O kg/rai with organic fertilizer 350 kg dry
weight/rai respectively. In sandy loam at farmer field, Uthai Thani Province, The result showed chemical
fertilizer rate 20-5-10 N-P 2O 5-K 2O kg/rai with organic fertilizer rate 350 kg dry weight/rai was highest yield
followed by chemical fertilizer rate 10-5-10 N-P 2O 5-K 2O kg/rai with organic fertilizer 350 kg dry weight/rai,
chemical fertilizer rate 20-5-10 N-P 2O 5-K 2O kg/rai, chemical fertilizer rate 5-5-10 N-P 2O 5-K 2O kg/rai with
organic fertilizer rate 350 kg dry weight/rai, chemical fertilizer rate 15-5-10 N-P 2O 5-K 2O kg/rai with organic
fertilizer rate 350 kg dry weight/rai, chemical fertilizer rate 0-5-10 N-P 2O 5-K 2O kg/rai with organic fertilizer
rate 350 kg dry weight/rai and organic fertilizer rate 350 kg dry weight/rai respectively.
Second year in clay loam at Lopburi Seed Multiplication Center, Lop Buri Province, in Split
plot in RCB experimental designed with 3 replications was 3 main plots as organic fertilizer and 4 sub
plots as chemical fertilizer. The result showed main plots as organic fertilizer had not significantly

different by organic fertilizer rate 1,040 kg dry weight/rai was highest yield, followed by no organic
fertilizer and organic fertilizer rate 520 kg dry weight/rai respectively. Sub plots as chemical fertilizer had
significantly different by chemical fertilizer rate 20-5-5 N-P 2O 5-K 2O kg/rai was highest yield followed by
chemical fertilizer rate 15-5-5 N-P 2O 5-K 2O kg/rai, chemical fertilizer rate 10-5-5 N-P 2O 5-K 2O kg/rai and
chemical fertilizer rate 0-5-5 N-P 2O 5-K 2O kg/rai respectively. In sandy loam at farmer field, Uthai Thani
Province. The result showed main plots as organic fertilizer had not significantly different by organic
fertilizer rate 1,040 kg dry weight/rai was highest yield, followed by no organic fertilizer and organic
fertilizer rate 520 kg dry weight/rai respectively. Sub plots as chemical fertilizer had not significantly
different by chemical fertilizer rate 15-5-10 N-P 2O 5-K 2O kg/rai was highest yield followed by chemical
fertilizer rate 0-5-10 20-5-10 and 10-5-10 N-P 2O 5-K 2O kg/rai respectively.

Keywords : Organic fertilizer, Nitrogen release

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1 1 ศูนย์วิจัยและพัฒนาเมล็ดพันธุ์พืชลพบุรี
Lopburi Seed Research and Development Center

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