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Method for controlling and measuring zizania latifolia biomass

A technology of control method and measurement method, which is applied in botany equipment and method, color/spectral characteristic measurement, agriculture, etc., can solve the problems of wetland ecosystem and fish farming loss, difficult to effectively control the biomass of wild rice, etc., and achieve improved control Accuracy, effect of assisting water level control

Active Publication Date: 2017-08-04
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a kind of effective wild rice biomass control method, has solved traditional method and is difficult to effectively control the biomass of wild rice, thereby causes the problem such as loss to wetland ecological system and fish farming

Method used

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  • Method for controlling and measuring zizania latifolia biomass
  • Method for controlling and measuring zizania latifolia biomass
  • Method for controlling and measuring zizania latifolia biomass

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Experimental program
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Embodiment 1

[0028] (1) Image selection

[0029] Wuchang Lake (30°17’N, 116°44’E) was selected for the monitoring and experiments of wild rice biomass control. Since wild rice is a perennial herbaceous plant, it must be able to perform long-term sequence measurements and have stable performance in terms of affecting the selection of treatment. At the same time, considering the cost and display resolution, this application chooses the US Landsat multispectral scanner with a spatial resolution of 60m. MSS, Thematic ImagerTM with a spatial resolution of 30m, and the Improved Thematic Imager ETM+. According to the previous field survey and the growth habits of wild rice, it was determined that July-September is the period with the largest biomass of wild rice in a year, so the images from July to September were selected to represent the growth of wild rice. The image cloud cover area is selected to be no more than 30%. In order to achieve the best image quality, the image cloud cover area is ...

Embodiment 2

[0049] From 2013 to 2015, Lake A (30°17′N, 116°35′E) in the northwest corner of Wuchang Lake, Lake B in the southwest corner of Wuchang Lake (30°14′N, 116°38′E) and C in the southeast corner were respectively selected. Three small lakes in the lake (30°15′N, 116°50′E) were tested for wild rice biomass. Since the area of ​​the three small lakes is not more than 5 mu and they are independent from the waters of Wuchang Lake, the three small lakes are suitable for the verification experiment of wild rice biomass control. The biomass control of wild rice is carried out through the water level or the combination of water level and biomass cutting every year at the beginning of tillering of wild rice. The specific control methods are shown in Table 2 and 3. After three years of verification, when the depth of the lake reaches 1m, the expansion area of ​​the three small lakes is close to 0. When the water level is maintained at 1.4m for three consecutive years, the distribution area ...

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Abstract

The invention belongs to the field of ecological protection and provides a method for controlling and measuring zizania latifolia biomass. The specific control method comprises the following steps: regulating a water depth or water level of a zizania latifolia growth environment during tillering of the zizania latifolia, namely controlling the water depth to be at least 1m in March to April every year, preferably controlling the water depth to be at least 1.5m in early March; and performing biomass cutting assisted control when the tiller number of the zizania latifolia starts to decrease and above-ground biomass starts to decline, wherein the relationship between the zizania latifolia biomass and the water depth or the water level accords with a GAM (Generalized Additive Model). According to the method disclosed by the invention, the biomass of the zizania latifolia is controlled through the water level of the growth environment in March to April every year according to growth habits of the zizania latifolia, and the problems that the traditional physical method is huge in cleaning workload and the ecological environment is damaged by herbicides are solved.

Description

technical field [0001] The invention belongs to the field of ecological protection and relates to a method for controlling the biomass of wild rice. Background technique [0002] Zizania latifolia (Zizania latifolia), also known as Zizania latifolia, is a perennial aquatic herbaceous plant in the Poaceae family. There are white stolons in the rhizosphere, and new plants sprout in spring. There are 20 species in total. It is generally distributed in southeastern China and grows every spring (March to May). It has the characteristics of high tiller density, early germination and photosynthesis, and low dependence on underground biomass. It is an important emergent plant in wetland ecosystems. one. An appropriate amount of emergent plants plays an important ecological function in the wetland system, which can prevent the lakeshore from erosion, absorb nutrients, and provide shelter, food and habitat for some fish and water birds. However, the expansion of excessive wild rice ...

Claims

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Application Information

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IPC IPC(8): G01N21/25A01G31/00
Inventor 曹垒贾强
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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