Establishment method for irrigation test system in forest root division zone

A method of establishing a root zone, a technique for establishing a root zone, which is applied in the field of establishing a forest tree root zone irrigation test system, can solve problems such as relatively large influence on the accuracy of test results, long time required for scientific research work, and long growth cycle, so as to ensure consistency and controllability, maintaining mutual independence, and the effect of well-developed tree fibrous root system

Inactive Publication Date: 2014-09-03
NANJING FORESTRY UNIV
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  • Summary
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Forest trees are perennial plants. Generally, the trees are relatively tall, their roots penetrate deep into the soil, and their growth cycle is long. Scientific research takes a long time, covers a large area, and requires a lot of work. There are great difficulties in the study of the physiological response and growth and development regulation mechanism of forest tree positioning irrigation
However, if the research results of photosynthesis characteristics and regulation mechanism under the condition of non-uniform root water supply of other plants are directly applied to perennial trees, sometimes there will be inconsistencies.
For example, most studies have confirmed that roots can synthesize ABA to regulate stomatal closure under drought stress, but other studies have shown that other factors may regulate stomatal opening and closing, rather than ABA.

Method used

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  • Establishment method for irrigation test system in forest root division zone
  • Establishment method for irrigation test system in forest root division zone
  • Establishment method for irrigation test system in forest root division zone

Examples

Experimental program
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Embodiment 1

[0039] Collect full and plump ginkgo seeds from the scion mother tree. The ginkgo seeds will germinate in spring (early March) at a temperature of 20-30°C. After the radicle grows to 1.0-2.0cm, the root tip will be cut off. Remove the root tip part 0.2~0.5cm away from the radicle tip, and sow the seeds by wide and narrow row on-demand method. The specific operation is 40cm wide row, 15cm narrow row, 6cm hole distance, and two ginkgo seeds are sown on demand at an interval of 3~4cm in each hole. Seeds, and the radicles of two ginkgo seeds are placed opposite each other.

[0040] In autumn, generally from mid-August to mid-to-late September, seedlings with basically the same size and complete root system are selected as rootstocks for grafting, and well-developed branches of the same ginkgo tree are selected as scions. To be basically the same as the rootstock, the leaves should be removed immediately after the scion is picked to prevent the scion from dehydration. Grafting pro...

Embodiment 2

[0044] Collect the full and plump ginkgo seeds on the scion mother tree, and germinate the seeds in spring (early March) at 20-30°C until the radicle grows to 1.0-2.0cm, depending on the length of the radicle, it will be 0.2-0.5 from the tip of the radicle. The root tip part of cm is removed, and the seeds are sown in wide and narrow rows. The wide row is 40 cm, the narrow row is 15 cm, and the hole distance is 6 cm. Two ginkgo seeds are sown on demand at an interval of 3 to 4 cm in each hole, and the radicles of the two ginkgo seeds are placed opposite to each other.

[0045] In autumn, generally from mid-August to mid-to-late September, seedlings with the same size and complete root system are selected as rootstocks for grafting, and well-developed annual shoots on the same ginkgo tree are selected as scions. The rootstocks are basically equal, and the leaves are removed immediately after the scion is picked to prevent the scion from dehydration. Such as figure 1 As shown, ...

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Abstract

The invention relates to an establishment method for an irrigation test system in a forest root division zone. Seedlings are adopted as root stocks, the parts, more than 10-12 cm away from the ground, of the root stocks are cut off, opposite faces of two adjacent root stocks are obliquely cut to piths, a branch on a seed tree of tree species to be researched is adopted as a scion, the two sides of the scion are obliquely cut and then grafted into the cut surfaces of the two root stocks, and a grafted seedling can have two complete root systems and one shared scion. A root division cultivation device comprising two plastic basins is assembled, nutrient soil or matrixes, of equal quantity, are filled into the two independent plastic basins, the two complete root systems of the grafted seedling are transplanted into the two plastic basins respectively, the grafted seedling is cultivated, and an irrigation test is carried out on the root division zone at the right moment. According to the method, uneven water supply conditions of a forest root system can be simulated, and alternate irrigation of the root division zone can be simulated for relevant researches. The method is applied to researches on alternate irrigation of the root division zone, drought stress, salt stress and other aspects and has important research and application value.

Description

technical field [0001] The invention relates to a method for establishing a test system for split-root zone irrigation of forest trees. Specifically, splitting the roots is realized through double-stock grafting of forest tree seedlings, and the complete root systems after splitting are planted in two independent culture substrate environments. To study the regulation mechanism of alternate root zone irrigation, drought stress and salt stress on the same plant. Background technique [0002] Alternate root irrigation is a new type of water-saving conditioning and fertilization technology proposed based on the relationship between plant photosynthesis, transpiration dehydration and leaf stomatal opening, root system signal transmission and stomatal regulation under drought conditions, and has been widely used in agriculture and forestry. At present, the application of split-root alternate irrigation technology is relatively single, focusing on crops and some fruit trees that ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G1/06A01G7/00A01G9/10A01G23/00
Inventor 郁万文曹福亮汪贵斌张往祥
Owner NANJING FORESTRY UNIV
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