Effects of fertilizer application on early vegetative growth and precocity of MYD x WAT hybrid coconut in Thailand

Dootson J., . and Kanong Klodpeng, . and Panit Ngankoranatigarn, . and Maliwan Rattanapruk, . (1986) Effects of fertilizer application on early vegetative growth and precocity of MYD x WAT hybrid coconut in Thailand. [Proceedings Paper]

An experiment to determine nitrogen potassium and magnesium requirements of MYD x WAT hybrid coconuts was set up in 1978. Vegetative characteristics were measured at six-monthly intervals and nuts harvested monthly. Fertilizer application did not significantly affect growth in the first year after planting. Absence of nitrogen significantly reduced girth height and leaf length in the second year and total frond production in the second and third years. Trunk length was reduced by nil nitrogen in the fourth and fifth years. Absence of potassium significantly reduced all growth parameters except trunk length from the second year. This could not be differentiated from the nil-fertilizer treatment. Magnesium did not affect growth. Luxury levels of all three nutrients studied induced apparent precocity. This was reduced at 62 months with the most pronounced observation being a reduction in early yield and percentage of palms bearing caused by absence of potassium or nitrogen. Foliar analyses were largely predictable. Nitrogen and potassium were mutually antagonistic and antagonism amongst cations was observed. Phosphate levels were predominantly reduced in the absolute control treatment but were also depressed by high levels of potassium

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Abstract

An experiment to determine nitrogen potassium and magnesium requirements of MYD x WAT hybrid coconuts was set up in 1978. Vegetative characteristics were measured at six-monthly intervals and nuts harvested monthly. Fertilizer application did not significantly affect growth in the first year after planting. Absence of nitrogen significantly reduced girth height and leaf length in the second year and total frond production in the second and third years. Trunk length was reduced by nil nitrogen in the fourth and fifth years. Absence of potassium significantly reduced all growth parameters except trunk length from the second year. This could not be differentiated from the nil-fertilizer treatment. Magnesium did not affect growth. Luxury levels of all three nutrients studied induced apparent precocity. This was reduced at 62 months with the most pronounced observation being a reduction in early yield and percentage of palms bearing caused by absence of potassium or nitrogen. Foliar analyses were largely predictable. Nitrogen and potassium were mutually antagonistic and antagonism amongst cations was observed. Phosphate levels were predominantly reduced in the absolute control treatment but were also depressed by high levels of potassium

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Item Type:	Proceedings Paper
Additional Information:	Available at Perpustakaan Sultan Abdul Samad Universiti Putra Malaysia 43400 UPM Serdang Selangor Malaysia. SB267 I61 1984 Call Number
AGROVOC Term:	Cocos nucifera
AGROVOC Term:	Magnesium
AGROVOC Term:	Maturation
Geographical Term:	MALAYSIA
Depositing User:	Ms. Norfaezah Khomsan
Last Modified:	24 Apr 2025 05:25
URI:	http://webagris.upm.edu.my/id/eprint/14332

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