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A method for enhancing the absorption of CD in soil by kenaf

A technology of kenaf and soil, applied in the restoration of polluted soil, botany equipment and methods, seed coating/seed dressing, etc., can solve problems such as loss, environmental problems, fertilizer waste, etc., to prevent damage and avoid Effects of secondary pollution, increased contact area and contact time

Active Publication Date: 2019-05-21
INST OF BAST FIBER CROPS CHINESE ACADEMY OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Aiming at inducing the growth of kenaf root hairs, the inventor has done a lot of research, and has made major breakthroughs in the ratio of nutrients and the selection of auxin types. However, these fertilizers dissolve quickly after being applied to the soil, and are easy to lose with rainfall or irrigation. Causes fertilizer waste and causes environmental problems, and needs multiple fertilization to meet the needs of the whole growth period of kenaf

Method used

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  • A method for enhancing the absorption of CD in soil by kenaf
  • A method for enhancing the absorption of CD in soil by kenaf
  • A method for enhancing the absorption of CD in soil by kenaf

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Example 1 Increase the density of kenaf root hairs by seed soaking

[0045] Prepare the culture solution for soaking seeds, KNO in the culture solution 3 The concentration is 5mM, NH 4 NO 3 The concentration is 25mM, H 3 BO 3 Concentration of 60µM, MnCl 2 Concentration of 10µM, ZnSO 4 at a concentration of 1 µM, CuSO 4 The concentration of NaCl is 0.5µM, the concentration of NaCl is 10µM, NaMoO 4 concentration of 0.3µM, Fe-EDTA concentration of 40µM, Ca(NO 3 ) 2 The concentration is 5.79mM, NH 4 h 2 PO 4 The concentration is 1.35mM.

[0046] The culture solution contained 1 µM MeJA, and the culture solution was adjusted to pH 6.5 with NaOH; the above-mentioned culture solution was sprayed on the germinated seeds, and purified water was used in the control group. The culture conditions were: photoperiod 16 / 8h, day and night temperature 30 / 28°C, relative humidity 60%. Pot experiments were carried out after two days of cultivation.

[0047] After potting for...

Embodiment 2

[0049] Example 2 Effect of Seed Dressing Agent on Root Growth of Kenaf Seedling Stage

[0050] The seed embryo after soaking treatment is mixed with the seed dressing agent, which contains 1-8 parts of rare earth nitrate, 20-25 parts of sodium fulvic acid, NH 4 NO 3 10-15 parts, MeJA0.1-0.5 parts, DPTA0.1-0.2 parts, mancozeb 4-5 parts, metalaxyl manganese 2-5 parts, cell excipient 1-3 parts, seed dressing The filler is bentonite, loess or palygorskite, the seed dressing agent is sterilized, and the weight ratio of seed dressing agent to seed embryo is 100:5;

[0051] Preferably, the cell excipient is sodium nitrophenolate or potassium nitrophenolate or a combination of the two;

[0052] The seed dressing agent of the control group is bentonite, and other test materials and culture conditions are consistent with the test group;

[0053] After 60 days in the field test, the roots of the kenaf seedlings were carefully stripped from the soil, and the root length, number of root...

Embodiment 3

[0055] Example 3 Four kinds of heavy metal chelating agents promote kenaf to the test of Cd absorption in soil

[0056] The test was carried out in May 2015. Kenaf was planted in Cd-contaminated farmland in Huayuan Village, Lukou Town, Zhuzhou County, Hunan Province. The previous crop in the test field was rice.

[0057] Before planting, the "5-point sampling method" was used to take soil samples from 0-20cm vertical section to measure the Cd content. The results were: 0.733mg / kg, 1.183mg / kg, 1.725mg / kg, 0.823mg / kg, 0.890mg / kg, with an average value of 1.071mg / kg. According to the soil pollution index calculation method and classification standards, combined with the background value of soil heavy metal content in Hunan Province of 0.126, it is determined that this farmland belongs to severe Cd polluted farmland.

[0058] The experiment was arranged in random blocks, each chelator treatment and control were repeated twice, a total of 10 plots, each plot was 3m wide, 2m long, a...

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Abstract

The invention provides a method for improving absorption capacity of kenaf to Cd in soil, belongs to the technical field of crop cultivation and agricultural environment conservation and recovery, and particularly relates to a kenaf planting method for recovering heavy metal cadmium-contaminated soil. Kenaf, as a traditional fiber crop, has the capacities of high growth speed, high biomass and high resistance to Cd, and becomes a pioneer substitute crop in regulation of agriculture structures of heavy metal cadmium-contaminated soil. Although the Cd resistance of kenaf is widely recognized, to widey plant kenaf as a crop for recovery has not been popularized yet, one of the purposes of the method is to promote growth of root hairs of kenaf, increase the density of the root hairs and make the large number of root hairs to be forked. Based on the above purposes, the invention provides a cultivation method with an inductor directly acting on root tips of kenaf. By means of the method, the purposes of restraining the root-knot nematode disease and greatly improving absorption capacity of kenaf to Cd in soil are further achieved.

Description

technical field [0001] The invention belongs to the technical fields of crop cultivation and agricultural environment conservation and restoration, and in particular relates to a kenaf planting method for repairing soil polluted by heavy metal cadmium. Background technique [0002] Heavy metal control is a global issue of modern agriculture. The problem of cadmium (Cd) pollution in farmland is particularly prominent. It is reported that 95,000-450,000 tons of Cd are emitted into soil every year worldwide. Excessive Cd pollution not only reduces the yield and quality of crops, but also affects human and animal health through the food chain, leading to cancer or deformity. Traditional remediation methods for soil heavy metal pollution usually use physical and chemical techniques, such as physical separation and chemical passivation. The principle is mainly to reduce the concentration of pollutants on the soil surface or enhance the stability of heavy metals in the soil, the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01G22/00A01C1/00A01C1/06B09C1/10
CPCA01C1/00A01C1/06A01G22/00B09C1/105B09C2101/00
Inventor 郭媛王玉富龙松华汤清明邱财生王慧
Owner INST OF BAST FIBER CROPS CHINESE ACADEMY OF AGRI SCI
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