Page 4 - การจัดทำค่ามาตรฐานของมหธาตุสำหรับแปลผลวิเคราะห์ดินและพืชในขมิ้นชัน Standard Values of Macronutrient Elements for Soil and Plant Analysis in Turmeric (Curcuma longa L.)

ห้องสมุดกรมพัฒนาที่ดิน

(3)

Abstract

Turmeric is a plant with medicinal properties that can be used in the medical

community. However, the standard concentration values of macronutrients in soil and plant
for fertilizer recommendations have not been reported, which is the nutrient group that

plants need high. The objective of this research was to establish standard plant nutrients
for Turmeric. Samples of 105 plots of turmeric leaf soil and rhizomes from high, medium

and low yield areas were analyzed for nutrient status and recorded. Turmeric rhizomes
were further analyzed for curcuminoids. The relationship between nutrient concentration

and curcuminoid yield were used to set nutrient standard values using boundary-line. The

results revealed that the sufficient ranges of sand, silt and clay particles in soils with high
curcuminoid yield from turmeric rhizome were 24.26-31.13, 27.60-35.11 and 19.70-31.63

percent, while the sufficient ranges of soil pH, organic matter were 5.8-6.4 and 31.54-39.43

g/kg, respectively. The sufficient ranges of available phosphorus, extractable potassium,
calcium, magnesium and sulfur were 16.30-29.78, 167-247, 1,315-1,842, 169-228 and 4.30-

7.69 mg/kg, respectively. In addition, the results showed that the sufficient ranges of nitrogen,

phosphorus, potassium, calcium, magnesium and sulfur in turmeric leaf were 23.07-26.16,
2.59-3.08, 31.35-36.59, 9.82-11.34, 2.17-2.59 and 0.48-0.72 g/kg, respectively. However, the

guidelines for evaluation of fertilizers should consider on the nutrient status in soil and
plant.

Keyword: plant nutrients, fertilizer recommendations, curcuminoid, nutrient balance, boundary-line