Method for estimating relative yield of under-mulch drip irrigation cotton based on field moisture capacity

A technology of field water holding capacity and relative yield, applied in the fields of botanical equipment and methods, watering devices, climate change adaptation, etc., can solve problems such as the inability to quantitatively characterize the impact of soil physical properties on crop growth and yield.

Pending Publication Date: 2021-06-29
TARIM UNIV
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Problems solved by technology

[0003] The purpose of the present invention is to solve the technical problem that the existing methods cannot quantitatively characterize the influence of soil physical properties on crop growth and yield, and provide a method for estimating the relative yield of cotton under mulch drip irrigation based on field water holding capacity

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  • Method for estimating relative yield of under-mulch drip irrigation cotton based on field moisture capacity

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specific Embodiment approach 1

[0010] Specific implementation mode one: the method for estimating relative yield of cotton under film drip irrigation based on field water capacity in this embodiment is as follows:

[0011] When the water upper limit of soil irrigation management is the field water capacity, the relationship equation between the relative yield of seed cotton and the field water capacity is:

[0012] Y=1430×(θ s -θ fc )-43 (1)

[0013] Among them, Y is the relative yield (%), θ fc is the field water capacity, unit: cm 3 cm –3 , θ s is the saturated water content, θ fc is the field water capacity, unit: cm 3 cm –3 .

[0014] The derivation process of equation (1) is as follows:

[0015] Express the soil moisture characteristic curve equation in logarithmic form, that is,

[0016] θ=θ s -Slog 10 h (2)

[0017] When S=0.03, the soil properties deteriorated seriously, and the relative yield of crops decreased to 0%; the soil water content corresponding to the water suction of 10kP...

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Abstract

The invention discloses a method for estimating the relative yield of under-mulch drip irrigation cotton based on field moisture capacity, relates to a method for estimating the relative yield of crops based on field moisture capacity, and belongs to the crossing field of soil science-crop cultivation science and tillage science. The invention aims to solve the technical problem that the influence of the physical properties of soil on the growth and yield of crops cannot be quantitatively represented by the existing method. The method comprises the following steps that when the upper limit of soil irrigation management moisture is the field moisture capacity, the relation equation of the relative yield of seed cotton and the field moisture capacity is Y = 1430 * (theta s-theta fc)-43 (1), wherein Y is the relative yield, theta fc is the field moisture capacity, theta s is the saturated moisture content, the unit is cm<3> cm<-3>, and theta fc is the field moisture capacity, and the unit is cm<3> cm<-3>. The invention provides the method for estimating the relative yield of the under-mulch drip irrigation cotton by taking the field moisture capacity (theta fc) as a parameter index, and the problem that the quantitative evaluation of the crop yield is influenced by the physical property of soil is solved.

Description

technical field [0001] The invention relates to a method for estimating the relative yield of crops based on field water holding capacity, and belongs to the cross field of soil science-crop cultivation science and tillage science. Background technique [0002] Soil physical properties are one of the important factors affecting crop growth and yield. However, how to quantitatively characterize the impact of soil physical properties on crop growth and yield has been a key issue that has not yet been resolved in related research. Field water capacity (θ fc ) is often used as the upper limit of soil moisture irrigation, which is of great significance in production practice. Contents of the invention [0003] The purpose of the present invention is to solve the technical problem that existing methods cannot quantitatively characterize the influence of soil physical properties on crop growth and yield, and to provide a method for estimating relative yield of cotton under mulc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G22/25A01G25/00
CPCA01G22/25A01G25/00Y02A40/22
Inventor 迟春明赵长巍卜东升
Owner TARIM UNIV
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