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Method for identifying stability of cadmium accumulation environment of grains of rice varieties

A technology of environmental stability and variety, applied in rice cultivation, horticultural methods, botanical equipment and methods, etc., can solve the problems of poor repeatability and achieve the effect of overcoming very poor repeatability

Active Publication Date: 2015-08-05
HUNAN RICE RES INST +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to solve the problems in the prior art above, and provide a method for identifying the stability of the rice variety grain cadmium accumulation environment, which overcomes the poor repeatability between the years of screening low-interval rice varieties in the existing field natural environment Identifying low-cadmium rice varieties that are not affected by the two factors of precipitation reduction and sharp rise in temperature during the critical growth period of cadmium absorption and operation, contributing to agricultural food security and protecting people's health

Method used

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  • Method for identifying stability of cadmium accumulation environment of grains of rice varieties
  • Method for identifying stability of cadmium accumulation environment of grains of rice varieties

Examples

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Embodiment 1

[0032]Taking natural paddy field soil with a total cadmium content of 1.28 mg / kg as an example to identify the environmental stability of two late rice varieties, Xiangwanxian 12 and Jingchuyou 866, see Table 1; the steps are as follows:

[0033] (1) Cultivation soil preparation: After the natural paddy field soil was dried in the shade and crushed through a 0.5mm sieve, 7 pots were prepared according to each variety, with 15 kg of dry soil per pot, and a total of 210 kg of dry soil was prepared, and cadmium-free N , P, K fertilizers;

[0034] (2) Potting: Put the prepared soil into an ordinary plastic pot. The diameter of the plastic pot used in this example is about 35cm, the diameter of the bottom is 20cm, and the height is 30cm. The thickness of the soil layer after flooding and settlement is about 25cm. Among them, 6 pots are evenly opened with 2 leaking holes with a diameter of 2 cm in the center of the pot bottom. Before filling the soil, place ceramic tiles or tiles on...

Embodiment 2

[0046] Take the natural paddy field soil potted with a total cadmium content of 0.89 mg / kg, and identify the environmental stability of two early rice varieties, Xiangxiang Zaoxian 45 and LY996, as an example, see Table 2; the steps are the same as in Example 1.

[0047] Table 2 Cadmium content in polished rice of early rice varieties under different environmental conditions (mg / kg)

[0048]

[0049] Table 2 shows that the early rice variety Xiangzaoxian 45 in the example can be identified as a variety with stable and low cadmium accumulation, and LY996 can be identified as an environmental variant cadmium accumulation variety.

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Abstract

The invention discloses a method for identifying stability of cadmium accumulation environment of the grains of rice varieties. The method includes planting paddy rice s of a variety in a pot, controlling soil moisture through a jardiniere, controlling air temperature through a phytotron, carrying out soil water content and air temperature treatment each for an active tillering stage, a heading period and a grain filling stage of the rice variety, harvesting paddy rice seeds according to the water contents and temperature processed and unprocessed contrast sets after the paddy rice matures, and detecting the cadmium content of the polished rice. If the cadmium content of the polished rice is lower than natural standard of 0.2mg / kg, the rice variety has stable grains and is low in cadmium accumulation under similar cadmium pollution level. The method overcomes the defects that a conventional means for sorting low cadmium rice variety in natural field environment is poor in repeatability annually, Paddy rice varieties with low cadmium can be identified, with key cadmium absorption and fertility stages being not affected by lowering precipitation and sharp rise of temperature. The method makes contribution to agricultural grain safety and protection of people's health.

Description

technical field [0001] The invention belongs to the technical field of agricultural food safety, and in particular relates to a method for identifying the environmental stability of cadmium accumulation in rice variety grains. Background technique [0002] Cadmium (Cd) is one of the most dangerous heavy metal elements in the agricultural environment, and it ranks first among the 12 hazardous chemicals of global significance proposed by the United Nations Environment Programme. Cadmium is a non-essential element in the human body, and its half-life in the human body is as long as 20 to 40 years, which can cause "bone pain disease" and kidney damage. Affected by factors such as excessive discharge of industrial "three wastes" for a long time, the pollution of agricultural production areas has been quite serious. Especially in recent years, the development and utilization of non-ferrous metals has accelerated. In addition, the background value of heavy metals in the soil is hig...

Claims

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Application Information

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IPC IPC(8): A01G16/00A01G7/00A01G22/22
Inventor 方宝华张玉烛
Owner HUNAN RICE RES INST
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