Saline-Sodic Paddy Field Thawing and Water Puddling Method
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Solution Overview
Problem
Conventional spring ploughing and land preparation methods in saline-sodic paddy fields result in shallow tillage layers, strong soil dispersion, poor water and air permeability, and insufficient support for transplanting machinery, leading to yield losses and poor seedling growth due to deep ruts and muddy conditions.
Innovation Solution
A method involving low-stubble harvesting, shallow ploughing, irrigation for thawing, and water puddling to a depth of 11-13 cm, followed by drying to enhance soil structure and support, allowing for improved water and air permeability and mechanical transplanting efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional water puddling is used in saline-sodic paddy fields, then the tillage layer can be prepared, but the sublayer becomes too soft and forms deep ruts, causing the plough pan to be uneven and transplanting quality to deteriorate
Solution Approach 1:
The patent applies preliminary action by performing thawing treatment on the sublayer before the water puddling operation. The sublayer is thawed to a controlled depth (5-8 cm) prior to puddling, so that when water is applied, the sublayer has sufficient strength to support the plough pan without forming deep ruts, while still allowing the tillage layer to be properly prepared.
2Ease of manufacture
If the tillage layer is thawed completely before water puddling, then water can be applied effectively, but the sublayer loses support strength and allows deep rut formation
Solution Approach 1:
The patent applies local quality by differentiating the thawing depth between the tillage layer and sublayer. The tillage layer (0-15 cm) is completely thawed to allow effective water application and puddling, while the sublayer (15-20 cm) is only partially thawed to a controlled depth (5-8 cm) to maintain sufficient support strength. This localized differentiation of thawing depth resolves the contradiction between ease of water application and sublayer support strength.
3Reliability
If straw is left in the field for sustainable development, then long-term agricultural sustainability is improved, but mechanical operations become more difficult and transplanting quality deteriorates
Solution Approach 1:
The patent applies preliminary action by performing thorough thawing and water puddling operations before straw removal. The controlled thawing of the sublayer and subsequent water puddling creates optimal soil conditions that facilitate easy straw removal and subsequent mechanical operations, even when straw is present in the field.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method ensures a smooth field surface, reduces seedling sinking, and enhances rice growth by improving soil structure, leading to higher yields and easier transplanting operations.
Implementation Method 1
the thawing process will be accelerated by the heat conduction between the soil and the water during irrigation and soaking
Implementation Method 2
the sublayer has been frozen to a depth of 5-8 cm, which has strong support strength for wheel rolling
Data Source
AI summary
A method for spring ploughing and land preparation in saline-sodic paddy fields with thawed water puddling and an application thereof are provided, relating to the technical field of spring ploughing and land preparation in saline-sodic paddy fields. The method includes the following steps: harvesting rice with low stubble left; removing straws from the paddy fields: removing straws after harvesting from fields; ploughing; fertilizing; irrigating for thawing; and drying.