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Method for improving and enhancing efficiency of potassium-deficient and calcium-poor rice field by utilizing biomass charcoal

A technology of biochar and potassium deficiency, applied in the direction of fertilization methods, applications, fertilizer mixtures, etc., can solve the problems of diverse biochar preparation processes and large performance differences, and achieve rich soil microbial abundance, high carbon content, strong adsorption effect

Active Publication Date: 2016-07-06
ZHEJIANG UNIV
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Problems solved by technology

However, the preparation process of biochar is diverse, and the performance is quite different.

Method used

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  • Method for improving and enhancing efficiency of potassium-deficient and calcium-poor rice field by utilizing biomass charcoal
  • Method for improving and enhancing efficiency of potassium-deficient and calcium-poor rice field by utilizing biomass charcoal
  • Method for improving and enhancing efficiency of potassium-deficient and calcium-poor rice field by utilizing biomass charcoal

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Embodiment Construction

[0014] The method of the present invention will be described below in conjunction with specific cases to further illustrate the present invention.

[0015] Establish a biochar return test base in Jingshan Town, Yuhang District, Hangzhou City. The basic physical and chemical properties of the soil are as follows: soil organic carbon in the plow layer is 17.1g kg -1 , total nitrogen 1.51g·kg -1 , total phosphorus 0.48g·kg -1 , pH value (1:2.5H 2 O) 5.9, cation exchange capacity 14.6cmol kg -1 , for sandy loam. Two treatments were set up in the field experiment, namely the conventional fertilization control (CK) and the addition of rice straw biochar + reduced fertilization treatment (SC). 4 replicates were set up for each treatment. A total of 8 experimental plots, each with a size of 3m×4m, were designed using a completely randomized block design method. In order to ensure the independence of the residential units, in addition to setting isolation belts between the reside...

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Abstract

The invention discloses a method for improving and enhancing efficiency of a potassium-deficient and calcium-poor rice field by utilizing biomass charcoal. According to the method disclosed by the invention, rice straw biomass charcoal is used as a soil modifying agent and a fertilizer efficiency enhancing agent; one week before rice seedlings are transplanted, the rice straw biomass charcoal is added into the low-yield potassium-deficient and calcium-poor rice field in a ratio of 22.5t / ha; 2-3 days before the seedlings are transplanted, watering is performed to soften the field; one day before the rice seedlings are transplanted, a nitrogen, phosphorous and potassium compound fertilizer is applied in a ratio of 417kg / ha; one month after the rice seedlings are transplanted, a nitrogen, phosphorous and potassium compound fertilizer with the same specification is applied in a ratio of 500kg / ha; and in other aspects, the rice seedlings are cultivated according to a conventional rice planting manner in China. Compared with conventional fertilization management, the method has the advantages that while the yield of rice is not reduced for a long period, about 50% of an inorganic nitrogen fertilizer is reduced in each year; and the soil quality is effectively improved, and the content of potassium and calcium in the soil of different depths in the potassium-deficient and calcium-poor rice field is improved. The method has the advantages of simplicity in preparation, economical and practical performances, high efficiency and durability, strong operability and the like, and has an important guide meaning of improving and enhancing efficiency of the low-yield potassium-deficient and calcium-poor rice field.

Description

technical field [0001] The invention relates to a method for applying biochar, in particular to a method for improving the efficiency of paddy fields lacking potassium and calcium by using rice straw biochar. Background technique [0002] my country is a big rice producing country, and rice fertilization management is an important guarantee for high rice yield. In order to increase rice yield, many times of topdressing inorganic fertilizers are currently used, which not only causes a lot of waste of resources and labor, increases the cost of rice production, but also brings about non-point source pollution caused by fertilizer loss, and long-term application of inorganic fertilizers. Soil acidification, compaction, hardening and other land quality degradation problems caused by fertilizer. Especially in southern China, soil acidification and degradation are serious, and various nutrients are lacking. It is reported that the average content of substitutable calcium in south...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01C21/00C05G3/04C05G3/80
CPCA01C21/005C05D9/00C05G3/00C05G3/80
Inventor 吴伟祥钟婷张璐
Owner ZHEJIANG UNIV
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