Method for supplying nitrogenous fertilizer for cool-season gramineous pasture community
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A cool-season, forage technology, applied in the field of plant growth, to achieve the effects of increased yield, improved fertilizer use efficiency, and reduced costs
Active Publication Date: 2013-09-25
INST OF ANIMAL SCI OF CHINESE ACAD OF AGRI SCI
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Problems solved by technology
But so far, there is no report on the use of spectral data and plant height data to construct the amount of nitrogen supplementation for pasture populations. If relevant technologies can be developed, there will be huge application prospects and economic value
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Embodiment 1
[0035] Embodiment 1: Experimental research in Jianyang, Sichuan
[0036] On March 6, 2013, it was carried out at the feed site of Yiming goose farm in Taiping Town, Jianyang City, Sichuan Province. The variety of ryegrass multiflora was Yangtze River No. 2 multiflora ryegrass (Sichuan Jinzhong Liaoyuan Seed Industry Technology Co., Ltd., local).
[0037] The specific planting method is as follows:
[0038]The original fertilization plan of the fodder field is to use the biogas slurry produced from livestock and poultry manure as organic fertilizer to irrigate the ryegrass multiflora in the fodder field.
[0039] Divide the test area into 3m*3m=9m 2 small pieces, a total of 18 small pieces. Two indicators of spectrum data and plant height are measured in each plot, and the method of the invention is used to calculate the amount of nitrogen supplementation. On the same day, the ryegrass multiflora was mowed and harvested, and then fertilization was carried out on each plot. ...
Embodiment 2
[0061] Embodiment 2: Sichuan Ziyang Experimental Research
[0062] In March 2013, a nitrogen fertilization test of ryegrass multiflora was carried out at the field experiment station of the Institute of Soil and Fertilizer, Sichuan Academy of Agricultural Sciences, Meishan City, Sichuan Province. The variety of ryegrass multiflora is Jiewei ryegrass multiflora (introduced from Sichuan Jinzhong Liaoyuan Seed Industry Technology Co., Ltd., the place of origin is the United States).
[0063] The specific planting method is as follows:
[0064] 1. Land preparation
[0065] Before the experiment, the stubble was plowed, and then the soil clods were broken by raking. Soil tests show that it is rich in available phosphorus and available potassium, so phosphorus and potassium fertilizers are not applied.
[0066] 2. Sowing
[0067] The sowing time was October 7, 2012. The sowing method was artificial sowing, placed on the surface, and the sowing rate was 20kg per hectare. The sow...
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Abstract
The invention relates to a method for supplying nitrogenous fertilizer for a cool-season gramineous pasture community. The method comprises the following steps of 1, carrying out fitting by red edge and near-infrared band spectrum data to obtain nitrogen content of a gramineous pasture community, 2, according to plant height of the gramineous pasture community, carrying out fitting by near-infrared, red edge and red light band spectrum data to obtain a yield of fresh gramineous pasture, 3, according to the plant height of the gramineous pasture community, carrying out fitting by near-infrared and red edge band spectrum data to obtain water content of the fresh gramineous pasture, 4, through a yield of dry substances of the gramineous pasture community, determining critical nitrogen content of the gramineous pasture community having the maximum growth rate, and 5, carrying out fitting by the difference between the critical nitrogen content and nitrogen content of the gramineous pasture community to obtain a nitrogenous fertilizer supplement amount of the gramineous pasture community. The method determines a nitrogenous fertilizer supplement amount by the spectrum data and plant height data, realizes targeted fertilization according to different gramineous pasture conditions, improves fertilizer utilization efficiency, and greatly improves a yield.
Description
technical field [0001] The invention relates to the field of plant growth, in particular to a method for obtaining the amount of nitrogen fertilizer supplemented by cool-season grass populations. Background technique [0002] At present, in the process of fertilization management for plant growth, the commonly used technology is soil testing and formula fertilization. That is, based on fertilizer field experiments and soil tests, according to the law of plant fertilizer demand, soil fertilizer supply capacity and different fertilizer effects, the types, quantities, fertilization periods and methods of fertilizer application are proposed. Since the soil in southern my country is seldom concentrated and contiguous, and mostly distributed in steps, different plots have large differences in fertility due to differences in planting systems and management. If all soil testing and analysis are carried out, the cost of testing and analysis is very high, which is inconvenient. Promot...
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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/25
Inventor 何峰李向林袁庆华万里强
Owner INST OF ANIMAL SCI OF CHINESE ACAD OF AGRI SCI
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