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A screening method for low-nitrogen-tolerant barley

A screening method and barley technology, applied in horticultural methods, botanical equipment and methods, nitrogen fertilizers, etc., can solve the problems of inability to compare the differences of the tested varieties, and achieve the goal of alleviating environmental pressure, avoiding inaccuracies, and reducing environmental burdens. Effect

Active Publication Date: 2020-03-31
SHANGHAI ACAD OF AGRI SCI
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Problems solved by technology

If the concentration of low nitrogen stress is inappropriate, then each variety may not have a significant change due to the decrease of nitrogen concentration, and it is impossible to compare the differences among the tested varieties

Method used

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  • A screening method for low-nitrogen-tolerant barley
  • A screening method for low-nitrogen-tolerant barley
  • A screening method for low-nitrogen-tolerant barley

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0032] 19 materials from the Shanghai area were selected as the test materials, see Table 1.

[0033] Table 1

[0034]

[0035] Take an appropriate amount of barley seeds, first sterilize them with 10% sanitin for 10 minutes, rinse them with clean water, soak the seeds at room temperature for 4-6 hours, then germinate them overnight, and put them on moist filter paper to germinate after the seeds are white.

[0036] Seven days later, take barley seedlings that grow consistently, wrap them with sponge strips, move them into perforated foam boards, and distribute 40 holes (5×8) on average on each foam board, and put them into a turnover tank filled with nitrogen nutrient solution. Box (the size of the turnover box is 42cm×30cm×10cm), pH 6.0, temperature 20°C, replenish water every day, manage diseases and insect pests well, and replace the nutrient solution once a week.

[0037] The low-nitrogen stress treatment was carried out around the three-leaf stage, and the barley seedl...

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Abstract

Provided is a screening method for low-nitrogen-resistant barley. Overground parts of the barley are used as screening research objects, a hydroponic method is used for selecting the shoot dry weightof the barley in the seedling stage as a screening index, low-nitrogen-resistant barley varieties are screened out, the appropriate low nitrogen stress concentration is determined, and the product ofrelative single plant nitrogen uptake and relative nitrogen physiological utilization efficiency is used for judging the tolerance degree of the barley to the low nitrogen environment to some extent to reflect the low nitrogen tolerance of barley materials. The low nitrogen tolerance of the barley is characterized by the shoot dry weight and the product of the relative single plant nitrogen uptakeand the relative nitrogen physiological utilization efficiency, which is more accurate compared with the characterization of low nitrogen tolerance by one aspect of nitrogen uptake or nitrogen physiological utilization efficiency. According to the barley screened by the method, the application rate of nitrogen fertilizers is effectively reduced, the environmental burden is reduced, and the application rate of the nitrogen fertilizers can be reduced to at least about one third of the total nitrogen to greatly alleviate the environmental pressure.

Description

technical field [0001] The invention belongs to the technical field of barley breeding, and in particular relates to a screening method for low-nitrogen-tolerant barley. Background technique [0002] Nitrogen is one of the indispensable macroelements for crop growth and development, and it is also a limiting factor for crop growth and development. Since the middle of last century, with the growth of population, in order to pursue crop yield in agricultural production, a large amount of nitrogen fertilizer has been used, even excessively used. [0003] At present, the total amount of nitrogen fertilizer application in my country ranks first in the world, and the amount of nitrogen fertilizer application per hectare is much higher than that of developed countries. However, it is estimated that only 30% to 50% of these nitrogen fertilizers are absorbed by crops, and the rest are through various channels. directly into the environment. This not only leads to a large consumption...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01G31/00A01C1/08A01G7/06C05G1/00
CPCA01C1/08A01G7/06A01G31/00C05B7/00C05G5/20C05C1/00C05D1/02C05D3/00C05D5/00C05D9/02
Inventor 陈志伟陆瑞菊姜琪黄剑华刘成洪宗营杰张述伟方春燕高润红何婷郭桂梅徐红卫李颖波周龙华
Owner SHANGHAI ACAD OF AGRI SCI
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