Rod bank for testing plant root growth penetrating power

Abstract

The invention provides a rod bank for testing plant root growth penetrating power and belongs to agricultural scientific research instruments. The rod bank comprises a standard reference rod and a contrast experiment rod and is structurally characterized in that a lower cylinder is coaxially mounted at the lower side part of an upper cylinder through a fixing clamp; a seedbed compaction soil layer and a soil covering layer are sequentially arranged in the upper cylinder from bottom to top, and a river sand layer is arranged in the lower cylinder; a gauze element is arranged between the seedbed compaction soil layer and the river sand layer; the soil bulk densities of the seedbed compaction soil layer in the standard reference rod and the contrast experiment rod are 1.10-1.20 g / cm<3> and 1.45-1.55 g / cm<3> respectively. The structure of the rod bank is simple, the manufacturing cost is low, test operation is simple and convenient, test data are accurate, the application range is wide, and a technical support is provided for basis research of crop seed root growth penetrating power.

Description

technical field [0001] The invention belongs to the agricultural scientific research instrument, and mainly relates to a device for measuring the ability of penetrating the soil during the root system growth of agricultural plants. Background technique [0002] Changes in soil compaction have an impact on the growth and development, absorption of nutrients and water of crop roots. On the one hand, as the compactness increases, the contact between the root system and the soil becomes closer, allowing more nutrients and water to enter the root system , so that the absorption capacity of a single root is improved; but on the other hand, with the increase of soil bulk density, the number of roots will be reduced, and the bulk density and soil mechanical resistance will affect the extension of the root system, thereby restricting and destroying the growth of the root system. The weight is reduced, which reduces the total absorption of nutrients and water. Especially in recent ye...

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Problems solved by technology

[0002] Changes in soil compaction have an impact on the growth and development, absorption of nutrients and water of crop roots. On the one hand, as the compactness increases, the contact between the root system and the soil becomes closer, allowing more nutrients and water to enter the root system , so that the absorption capacity of a single root is improved; but on the other hand, with the increase of soil bulk density, the number of roots will be reduced, and the bulk density and soil mechanical resistance will affect the extension of the root system, thereby restricting and destroying the growth of the root system. The weight is reduced, which reduces the total absorption of nutrients and water

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