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Method for diagnosing nitrogen nutrition of tea tree

A tea tree nitrogen and diagnostic method technology, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of critical point difficulties, varieties, seasons and soil texture effects, and limited applications

Inactive Publication Date: 2017-05-17
TEA RES INST CHINESE ACAD OF AGRI SCI
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Problems solved by technology

However, studies have found that tea tree leaf color, chlorophyll content, and total nitrogen content are significantly affected by species, seasons, and soil texture, making it difficult to determine the critical point of nitrogen abundance and deficiency in tea trees, which limits its application in the diagnosis of nitrogen nutrition in tea trees

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  • Method for diagnosing nitrogen nutrition of tea tree
  • Method for diagnosing nitrogen nutrition of tea tree
  • Method for diagnosing nitrogen nutrition of tea tree

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Experimental program
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Effect test

Embodiment 1

[0021] 1. Test material

[0022] The test was completed at the test site of the Tea Research Institute of the Chinese Academy of Agricultural Sciences from 2013 to 2016. The six varieties (lines) used in the test are Longjing 43, Yada, 18A, LY002, LY011 and LY20B.

[0023] 2. Test setup

[0024] In October 2013, 40 14-month-old cutting seedlings with the same growth were selected for each variety (line), and planted in double-plant side nests, with a large row spacing of 150 cm, a small row spacing of 40 cm, and a hole spacing of 33 cm. Fertilization treatment: The tea seedlings are carried out according to the routine management demonstration in the field, and the fertilization method is unilateral ditching and urea and cake fertilizer.

[0025] 3. Leaf color difference of mature leaves and comparison of SPAD value

[0026] In April 2016, it was found that there was a difference between the yellowing of mature leaves of the tea tree row far from the fertilized ditch (N def...

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Abstract

The invention relates to a method for diagnosing nitrogen nutrition of a tea tree, and belongs to the technical field of diagnosis of plant nutrition. The method comprises the following steps of (1) sample collection; (2) leaf cleaning and drying; (3) sample crushing and extraction treatment; (4) measuring of theanine content by HPLC (high performance liquid chromatography); (5) calculation of nitrogen nutrition index of the tea tree; (6) diagnosis of the nitrogen nutrition of the tea tree, wherein when the nitrogen nutrition index is less than or equal to 0.70, the nitrogen is not enough, and a nitrogen fertilizer needs to be applied; when the nitrogen nutrition index is more than 0.70, the nitrogen nutrition is enough. The method for diagnosing the nitrogen nutrition of the tea tree has the advantages that the interference to the diagnosis of the nitrogen nutrition due to different genetic backgrounds of the tea tree is reduced, the technical reference is provided for the fertilizer applying of a tea garden, and the method is significant in the modern tea garden management.

Description

technical field [0001] The invention belongs to the technical field of plant nutrition diagnosis, in particular to a method for diagnosing nitrogen nutrition of tea trees. Background technique [0002] The tea industry is a traditional industry in my country's agricultural economy, and the yield and quality of its fresh leaves play an important role in the economic benefits of this industry. Nitrogen is one of the important elements for the growth and development of tea trees, timely and appropriate application of nitrogen fertilizer can improve the yield and quality of fresh leaves. Therefore, diagnosing the nitrogen nutrition status of tea trees, studying the mechanism of efficient nitrogen utilization and breeding varieties with efficient nitrogen utilization have become research hotspots in recent years. [0003] Chemical analysis diagnosis is to use chemical methods to measure the nitrogen content of plant leaves or the whole plant, and then compare it with plants with...

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Application Information

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IPC IPC(8): G01N30/02
CPCG01N30/02
Inventor 王丽鸳成浩韦康阮丽张成才李海琳白培贤
Owner TEA RES INST CHINESE ACAD OF AGRI SCI