Search engine for discovering works of Art, research articles, and books related to Art and Culture
Javascript must be enabled to continue!
Identification of Soil Organic Nitrogen Substance Acting as Indicator of Response of Cocoa Plants to Nitrogen Fertilizer
View through CrossRef
An indicator needed for estimating the presence of response of cocoa (Theobroma cacao) trees to nitrogen (N) fertilizer has been well understood, however there is still little progress on the work on identification of organic N fraction which regulates the response of cocoa to N fertilizer. The objective of this study is to identify a fraction of soil organic N which is very closely related with degree of cocoa response to N fertilizer. Hydrolyses were performed on soil samples derived from 23 sites of cocoa plantations distributed both in Banyuwangi district (12 sites) and in Jember district (11 sites). Analysis of organic N fractions consisted of total hydrolysable N, ammonium N, amino sugar N, amino acid N and combinations of those fractions. To investigate the level of cocoa plants response to N fertilizer, seedlings of cocoa were planted in plastic pots treated with and without urea as source of N. Degree of response of cocoa plants to N fertilizer was measured based on growth parameters, such as plant height, leaf number, stem girth, fresh weight of stem, leaf and shoot; and dry weight of stem, leaf and shoot. Results of this study showed that biggest response of cocoa was shown by dry weight of leaf at the level of 29,22% (in the range of -17,43% – 95,98%), whereas the smallest response was shown by stem dry weight at the level of -1,04 (in the range of -26,16 – 47,54). From those of organic N fractions analyzed, only N ammonium did not show any significant correlations with all the growth parameters observed. Leaf dry weight was the most closely related parameter with nearly all organic N fractions followed by shoot dry weight and stem girth. The soil organic N fraction which had very significant relation with cocoa plant response was total hydrolysable N. Using the method of Cate-Nelson, it was revealed that cocoa gardens contain total hydrolysable N less than 1273 mg/kg were classified as responsive to N fertilizer.Key words: plant response, Theobroma cacao, soil organic nitrogen, N fertilizer, soil testing, fertilization, soil variability, soil hydrolysis
Riset Perkebunan Nusantara
Title: Identification of Soil Organic Nitrogen Substance Acting as Indicator of Response of Cocoa Plants to Nitrogen Fertilizer
Description:
An indicator needed for estimating the presence of response of cocoa (Theobroma cacao) trees to nitrogen (N) fertilizer has been well understood, however there is still little progress on the work on identification of organic N fraction which regulates the response of cocoa to N fertilizer.
The objective of this study is to identify a fraction of soil organic N which is very closely related with degree of cocoa response to N fertilizer.
Hydrolyses were performed on soil samples derived from 23 sites of cocoa plantations distributed both in Banyuwangi district (12 sites) and in Jember district (11 sites).
Analysis of organic N fractions consisted of total hydrolysable N, ammonium N, amino sugar N, amino acid N and combinations of those fractions.
To investigate the level of cocoa plants response to N fertilizer, seedlings of cocoa were planted in plastic pots treated with and without urea as source of N.
Degree of response of cocoa plants to N fertilizer was measured based on growth parameters, such as plant height, leaf number, stem girth, fresh weight of stem, leaf and shoot; and dry weight of stem, leaf and shoot.
Results of this study showed that biggest response of cocoa was shown by dry weight of leaf at the level of 29,22% (in the range of -17,43% – 95,98%), whereas the smallest response was shown by stem dry weight at the level of -1,04 (in the range of -26,16 – 47,54).
From those of organic N fractions analyzed, only N ammonium did not show any significant correlations with all the growth parameters observed.
Leaf dry weight was the most closely related parameter with nearly all organic N fractions followed by shoot dry weight and stem girth.
The soil organic N fraction which had very significant relation with cocoa plant response was total hydrolysable N.
Using the method of Cate-Nelson, it was revealed that cocoa gardens contain total hydrolysable N less than 1273 mg/kg were classified as responsive to N fertilizer.
Key words: plant response, Theobroma cacao, soil organic nitrogen, N fertilizer, soil testing, fertilization, soil variability, soil hydrolysis.
Related Results
Ecological soil physics as section of ecological soil science
Ecological soil physics as section of ecological soil science
Nowadays, there is a general penetration of ecology in other related sciences. Soil science is not an exception. To the evidence of this, the works of soil scientists may serve, th...
Exploring Barriers to Agroforestry Adoption by Cocoa Farmers in South-Western Côte d’Ivoire
Exploring Barriers to Agroforestry Adoption by Cocoa Farmers in South-Western Côte d’Ivoire
Agroforestry is part of the package of good agricultural practices (GAPs) referred to as a reference to basic environmental and operational conditions necessary for the safe, healt...
Rebuilding Tree Cover in Deforested Cocoa Landscapes in Côte d’Ivoire: Factors Affecting the Choice of Species Planted
Rebuilding Tree Cover in Deforested Cocoa Landscapes in Côte d’Ivoire: Factors Affecting the Choice of Species Planted
Intensive cocoa production in Côte d’Ivoire, the world’s leading cocoa producer, has grown at the expense of forest cover. To reverse this trend, the country has adopted a “zero de...
ANALISIS KATEKIN DAN EPIKATEKIN DALAM BIJI KAKAO SERTA PRODUK OLAHANNYA MENGGUNAKAN KROMATOGRAFI CAIR SPEKTROMETRI MASSA
ANALISIS KATEKIN DAN EPIKATEKIN DALAM BIJI KAKAO SERTA PRODUK OLAHANNYA MENGGUNAKAN KROMATOGRAFI CAIR SPEKTROMETRI MASSA
Processing cocoa beans to the cocoa product is estimated can affect active compound in the inside, especially catechin and epicatechin. Therefore, sampling was done from several st...
Changes characteristics of soil microbial biomass carbon,nitrogen and enzyme activity of Panax notoginseng under optimal management of water and fertilizer
Changes characteristics of soil microbial biomass carbon,nitrogen and enzyme activity of Panax notoginseng under optimal management of water and fertilizer
There is a lack of understanding of the dynamic characteristics of
carbon, nitrogen, and enzyme activity of soil microbial load of Panax
notoginseng in water-fertilizer intercrops....
Organic and mineral fertilizer application in upland rice irrigated by sprinkler irrigation: economic analysis
Organic and mineral fertilizer application in upland rice irrigated by sprinkler irrigation: economic analysis
Organic fertilizers produced by agro-industrial waste are sources of nutrients for plants, making it relevant to study their technical and economic efficiency in several crops as w...
Soil Chemical Properties and Nutrient Uptake of Cocoa as Affected by Application of Different Organic Matters and Phosphate Fertilizers
Soil Chemical Properties and Nutrient Uptake of Cocoa as Affected by Application of Different Organic Matters and Phosphate Fertilizers
Effort repair of land quality better be done by simultan namely with application of organic matters and inorganic fertilization. The objective of this research is to study the effe...
Intensity of Ground Cover Crop Arachis pintoi, Rhizobium Inoculation and Phosphorus Application and Their Effects on Field Growth and Nutrient Status of Cocoa Plants
Intensity of Ground Cover Crop Arachis pintoi, Rhizobium Inoculation and Phosphorus Application and Their Effects on Field Growth and Nutrient Status of Cocoa Plants
Arachis pintoiis potentially as a cover crop for cocoa (Theobroma cacaoL.) farm, however information regarding its effect on the growth of cocoa plants in the field is very limited...