Abstract
【Objective】The purpose of this study was to explore the effects of application of different amounts of silicon amendment on Cd uptake by leafy vegetables and soil available Cd concentration in cadmium over-standard vegetable field and to provide reference for proper use of silicon amendment to reduce leafy vegetable Cd concentration.【Method】Two field experiments were carried out to investigate Cd bioavailibity in soils and Cd accumulation by leafy vegetables under four levels of silicon amendment application in Cd over-standard fields in the suburbs of Guangzhou in 2009.【Result】The results showed that compared with the control silicon amendment insignificantly increased the output of flowering Chinese cabbage and lettuce grown in Cd over-standard soils,while shoot Si concentrations of flowering Chinese cabbage and lettuce significantly increased by 1.00-and 2.40-fold in the silicon amendment at 60 kg·667m-2 treatment,respectively,and their root of Si concentrations increased by 0.95-and 2.37-fold,respectively.In comparison with the control,the silicon amendment at 60 kg·667m-2 significantly reduced shoot and root Cd concentrations of flowering Chinese cabbage and lettuce,with shoot Cd concentration reducted by 25% and 32% and root by 17% and 15% respectively.Compared with the control,silicon amendment decreased soil DTPA-Cd concentrations significantly,and insignificantly affected soil pH of No.1 vegetable field,but significantly increased soil pH of No.2 with no significant differences between application levels.【Conclusion】At the application level of 60 kg·667m-2,silicon amendment could significantly reduce plant Cd content,and might be used as an effective soil amendment to inhibit Cd uptake by vegetables in Cd over-standard soil.
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Claims 9
Claim · model-written summary
Silicon amendment insignificantly increased the output of flowering Chinese cabbage and lettuce grown in Cd over-standard soils.
- Taxon
- flowering Chinese cabbage and lettuce
Lactuca sativa
Brassica rapa subsp. pekinensise1 - Treatment
- silicon amendmente1
- Outcome
- outpute1
- Direction
- insignificantly increasede1
- Comparator
- controle1
- Setting
- Cd over-standard soilse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effect of Application of Silicon Amendment on Cd Over-Standard Soils of Vegetable Fields”
e1“compared with the control silicon amendment insignificantly increased the output of flowering Chinese cabbage and lettuce grown in Cd over-standard soils”
Claim · model-written summary
Silicon amendment at 60 kg·667m-2 significantly increased shoot Si concentrations of flowering Chinese cabbage and lettuce by 1.00-and 2.40-fold.
- Taxon
- flowering Chinese cabbage and lettuceLactuca sativaBrassica rapa subsp. pekinensise2
- Treatment
- silicon amendment at 60 kg·667m-2e2
- Outcome
- shoot Si concentrationse2
- Direction
- significantly increasede2
- Value
- 1.00-and 2.40-folde2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effect of Application of Silicon Amendment on Cd Over-Standard Soils of Vegetable Fields”
e2“while shoot Si concentrations of flowering Chinese cabbage and lettuce significantly increased by 1.00-and 2.40-fold in the silicon amendment at 60 kg·667m-2 treatment”
Claim · model-written summary
Silicon amendment at 60 kg·667m-2 increased root Si concentrations of flowering Chinese cabbage and lettuce by 0.95-and 2.37-fold.
- Taxon
- flowering Chinese cabbage and lettuceLactuca sativaBrassica rapa subsp. pekinensise2
- Treatment
- silicon amendment at 60 kg·667m-2e2
- Outcome
- root of Si concentrationse3
- Direction
- increasede3
- Value
- 0.95-and 2.37-folde3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effect of Application of Silicon Amendment on Cd Over-Standard Soils of Vegetable Fields”
e2“while shoot Si concentrations of flowering Chinese cabbage and lettuce significantly increased by 1.00-and 2.40-fold in the silicon amendment at 60 kg·667m-2 treatment”
e3“and their root of Si concentrations increased by 0.95-and 2.37-fold”
Claim · model-written summary
Silicon amendment at 60 kg·667m-2 significantly reduced shoot and root Cd concentrations of flowering Chinese cabbage and lettuce compared with the control.
- Taxon
- flowering Chinese cabbage and lettuceLactuca sativaBrassica rapa subsp. pekinensise4
- Treatment
- silicon amendment at 60 kg·667m-2e4
- Outcome
- shoot and root Cd concentrationse4
- Direction
- significantly reducede4
- Comparator
- controle4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effect of Application of Silicon Amendment on Cd Over-Standard Soils of Vegetable Fields”
e4“In comparison with the control,the silicon amendment at 60 kg·667m-2 significantly reduced shoot and root Cd concentrations of flowering Chinese cabbage and lettuce”
Claim · model-written summary
Silicon amendment at 60 kg·667m-2 reduced shoot Cd concentration of flowering Chinese cabbage and lettuce by 25% and 32%.
- Taxon
- flowering Chinese cabbage and lettuceLactuca sativaBrassica rapa subsp. pekinensise4
- Treatment
- silicon amendment at 60 kg·667m-2e4
- Outcome
- shoot Cd concentratione5
- Direction
- reductede5
- Value
- 25% and 32%e5
- Comparator
- controle4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effect of Application of Silicon Amendment on Cd Over-Standard Soils of Vegetable Fields”
e4“In comparison with the control,the silicon amendment at 60 kg·667m-2 significantly reduced shoot and root Cd concentrations of flowering Chinese cabbage and lettuce”
e5“with shoot Cd concentration reducted by 25% and 32% and root by 17% and 15% respectively”
Claim · model-written summary
Silicon amendment at 60 kg·667m-2 reduced root Cd concentration of flowering Chinese cabbage and lettuce by 17% and 15%.
- Taxon
- flowering Chinese cabbage and lettuceLactuca sativaBrassica rapa subsp. pekinensise4
- Treatment
- silicon amendment at 60 kg·667m-2e4
- Outcome
- root Cd concentrationse4
- Direction
- reductede5
- Value
- 17% and 15%e5
- Comparator
- controle4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effect of Application of Silicon Amendment on Cd Over-Standard Soils of Vegetable Fields”
e4“In comparison with the control,the silicon amendment at 60 kg·667m-2 significantly reduced shoot and root Cd concentrations of flowering Chinese cabbage and lettuce”
e5“with shoot Cd concentration reducted by 25% and 32% and root by 17% and 15% respectively”
Claim · model-written summary
Silicon amendment significantly decreased soil DTPA-Cd concentrations compared with the control.
- Taxon
- flowering Chinese cabbage and lettuceLactuca sativaBrassica rapa subsp. pekinensise4
- Treatment
- silicon amendmente6
- Outcome
- soil DTPA-Cd concentrationse6
- Direction
- decreasede6
- Comparator
- controle6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effect of Application of Silicon Amendment on Cd Over-Standard Soils of Vegetable Fields”
e4“In comparison with the control,the silicon amendment at 60 kg·667m-2 significantly reduced shoot and root Cd concentrations of flowering Chinese cabbage and lettuce”
e6“Compared with the control,silicon amendment decreased soil DTPA-Cd concentrations significantly”
Claim · model-written summary
Silicon amendment significantly increased soil pH of field No.2.
- Taxon
- flowering Chinese cabbage and lettuceLactuca sativaBrassica rapa subsp. pekinensise4
- Treatment
- silicon amendmente4
- Outcome
- soil pHe6
- Direction
- significantly increasede6
- Setting
- No.2e6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effect of Application of Silicon Amendment on Cd Over-Standard Soils of Vegetable Fields”
e4“In comparison with the control,the silicon amendment at 60 kg·667m-2 significantly reduced shoot and root Cd concentrations of flowering Chinese cabbage and lettuce”
e6“but significantly increased soil pH of No.2 with no significant differences between application levels”
Claim · model-written summary
Silicon amendment insignificantly affected soil pH of field No.1.
- Taxon
- flowering Chinese cabbage and lettuceLactuca sativaBrassica rapa subsp. pekinensise4
- Treatment
- silicon amendmente4
- Outcome
- soil pHe6
- Direction
- insignificantly affectede6
- Setting
- No.1 vegetable fielde6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effect of Application of Silicon Amendment on Cd Over-Standard Soils of Vegetable Fields”
e4“In comparison with the control,the silicon amendment at 60 kg·667m-2 significantly reduced shoot and root Cd concentrations of flowering Chinese cabbage and lettuce”
e6“and insignificantly affected soil pH of No.1 vegetable field”
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