Method for measuring use rate of nitrogen balance nitrogen fertilizer of greenhouse pot experiment

A technology of nitrogen balance and determination method, which is applied in horticultural methods, botanical equipment and methods, applications, etc., can solve problems such as instability and low nitrogen fertilizer application, and achieve comprehensive consideration of factors, large market promotion value and Foreground, the effect of short measurement time

Inactive Publication Date: 2014-03-26
中国农业科学院德州盐碱土改良实验站
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for measuring the utilization rate of nitrogen balance and nitrogen fertilizer in greenho

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0024] Select a suitable rain-proof greenhouse, prepare nitrogen-free water as irrigation water for the test, and arrange pot experiments. The specific measurement steps are as follows:

[0025] 1. Select a representative soil

[0026] It can represent the plow layer soil in a certain area, and the intrusions are removed and sieved for later use.

[0027] 2. Layout and management of potted plants

[0028] 1), fully mix the soil evenly, each pot (20×35cm 2 ) loaded with 5 kg of soil, repeated 4 times.

[0029] 2) Set 4 amounts of nitrogen fertilizer, add 0.00g, 0.10g, 0.20g, 0.30g of nitrogen to each pot of soil.

[0030] 3) For corn crops, 3 seedlings are kept in each pot, and the growth process is routinely investigated, and the amount of irrigation is consistent, and the crops are managed according to conventional methods.

[0031] 4) Harvest the corn at maturity, record the grain yield and straw yield and study abroad.

[0032] 5) After the corn is harvested, mix the s...

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Abstract

The invention relates to a measuring method for nitrogen fertilizer utilization, and discloses a method for measuring the use rate of nitrogen balance nitrogen fertilizer of a greenhouse pot experiment. The method comprises the following steps of selecting representative surface soil; arranging the pot experiment, carrying out management, recording the grain yield and the straw yield when crops are ripe, and reserving samples for analysis; measuring the base soil total nitrogen content, the grain total nitrogen content, the total nitrogen content of soil in each pot after the crops are harvested. The calculation formula is REN[balance]=U/(FN+SN), wherein the REN[balance] represents the nitrogen fertilizer use rate calculated through a nitrogen balance method, the U represents harvest nitrogen elements, the FN represents fertilizer nitrogen elements, and the SN represents the storage capacity reduction quantity of nitrogen elements of soil of a soil body. The method is short in measuring time and accurate in measuring result, influence caused by the external environment on the method is low, the considered factors are comprehensive and reasonable, the measuring result is stable and reliable, fertilizer application can be well guided according to the recommended, amount calculated through the method, of applied fertilizer, and the method has high market popularization value and broad market prospect.

Description

technical field [0001] The invention relates to a method for measuring nitrogen fertilizer utilization. Background technique [0002] As we all know, nitrogen fertilizer is a chemical fertilizer containing the crop nutrient nitrogen, which plays a very important role in crop growth. It is a component of amino acids in plants, a component of protein, and a component of chlorophyll that plays a decisive role in photosynthesis in plants. components, and nitrogen can also help crops disperse. Therefore, a reasonable increase in nitrogen fertilizer can not only increase the yield of crops, fertilize soil nitrogen fertility, but also improve the quality of crops, but excessive fertilization has negative effects on crop quality and atmospheric environment to varying degrees, and this effect requires scientific research Personnel provide effective, economical and efficient fertilization methods and fertilization rates, and soil nitrogen utilization rate (subtraction method) is an i...

Claims

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Application Information

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IPC IPC(8): A01G1/00A01G7/00G01N33/24
Inventor 田昌玉林治安赵秉强孙文彦车升国左余宝唐继伟
Owner 中国农业科学院德州盐碱土改良实验站
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