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Japonica rice three-factor nutrition management method

A management method and nutrient technology, applied in the field of agriculture, can solve the problems of insignificant yield increase effect, difficulty in achieving high yield, high quality, efficient use of nutrients, and few researches on field nutrient management technology

Inactive Publication Date: 2010-12-15
YANGZHOU UNIV
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AI Technical Summary

Problems solved by technology

The rice field nutrient management technology (SSNM) developed by the International Rice Research Institute has been promoted and applied in Southeast Asian countries and southern my country, and has achieved obvious nitrogen-saving effects. However, this technology is mainly applied to indica rice in double-cropping rice areas. There are few studies on field nutrient management technology of japonica rice, and the effect of increasing yield is not obvious; the precise quantitative application technology developed by Mr. Ling Qihong is mainly based on the fertilization formula [nitrogen application amount = (nitrogen demand of target yield - nitrogen supply of soil) / nitrogen fertilizer The current season utilization rate] to calculate the total amount, and then determine the application ratio of basal tiller fertilizer and ear fertilizer, without considering the difference of rice types, it is difficult to achieve the coordinated development of high yield, high quality, and efficient use of nutrients

Method used

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  • Japonica rice three-factor nutrition management method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: Fertilization management of japonica rice varieties (yield target > 9t / ha)

[0026] The soil foundation is moderately fertile (the output of nitrogen fertilizer blank area is ≥4.95t / ha)

[0027] 1. The total amount of nitrogen, phosphorus and potassium application

[0028] (1) Total amount of nitrogen fertilizer (N) = (target yield - basic soil yield) / agronomic utilization rate of nitrogen fertilizer = (9-4.95) / 15 = 270kg / ha

[0029] (2) Phosphate fertilizer (P 2 o 5 ) total amount:

[0030] N:P 2 o 5 =1:0.3; Phosphate fertilizer (P 2 o 5 )=270×0.3=90kg / ha

[0031] (3) Potassium fertilizer (K 2 O) Total amount:

[0032] N:K 2 O=1:0.5; potassium fertilizer (K 2 O)=270×0.5=135kg / ha

[0033] 2. Fertilization period and fertilizer amount

[0034] 1) Base fertilizer (applied 1 day before transplanting)

[0035] The basal fertilizer nitrogen fertilizer accounts for 50% of the total nitrogen application rate (120kgN / ha), and all the phosphate fe...

Embodiment 2

[0136] Embodiment two: the japonica rice high-yield " three causes " nutrient management method of establishment has carried out field comparative test in southern Jiangsu, central Jiangsu and northern Jiangsu 30 peasant households, and half of field is local high-yield fertilization method (contrast, figure 1 Right), the other half of the application embodiment one "three reasons" nutrient management method, see figure 1 Left). Other cultivation measures are the same as:

[0137] 1. Machine transplanting technology

[0138] Technical points: (1) Precise sowing and uniform sowing, floppy disk dry seedling raising. Sow 100 grams of dry grain per plate, and the seedling-to-field ratio is 1:80; (2) The seedling age is controlled within 20 days, and the basic seedlings are planted, with a row spacing of 30cm×11.7cm, 1.6-18,000 holes per mu, and 3-4 seedlings per hole. About 70,000 to 80,000 basic seedlings per mu.

[0139] 2. The technology of returning full amount of wheat st...

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Abstract

The invention belongs to the agriculture technical field, used for rice high yield nutrition efficient utilization cultivation, in particular relates to a japonica rice nitrogen, phosphorus and potassium fertilizers applying method. The method includes the following steps: fertilizer applying total weight is determined; leaf colour is determined; breed and fringe type are determined; and corresponding fertilizer applying management is carried out according to the determined fertilizer applying total weight, basic soil fertility, leaf colour and fringe type. Compared with the local high yield fertilizer applying method, the japonica rice high yield 'three-factor' nutrition management method in the invention has the advantages that mean nitrogen fertilizer application rate of the 'three-factor' nutrition management method is reduced by 15-22%, yield is improved by 6.6-10.6%, agricultural utilization ratio of nitrogen fertilizer is improved by 47-53%, and production capacity of nitrogen fertilizer is improved by 30-33%.

Description

technical field [0001] The invention belongs to the field of agricultural technology and is used for high-yield and high-efficiency nutrient utilization cultivation of rice, in particular to a nitrogen, phosphorus and potassium fertilization method for japonica rice. Background technique [0002] The large amount of rice fertilizer input and low utilization efficiency are prominent problems in rice production in my country. my country's current average rice nitrogen application rate is 180kg hm-2, which is 75% higher than the world's average rice nitrogen application rate. In some counties (cities) of Jiangsu Province, the amount of nitrogen fertilizer applied to rice exceeds 300kg hm-2. Excessive application of nitrogen fertilizer caused a sharp drop in nitrogen use efficiency. The absorption and utilization rate of rice nitrogen fertilizer in my country is only 30-35%, which is 15-20 percentage points lower than that of developed countries. Excessive application of nitr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01C21/00A01G16/00A01G22/22
Inventor 杨建昌刘立军王志琴
Owner YANGZHOU UNIV
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