A field demonstration of reduction of lead availability in a soil and cabbage (Brassica Chinensis L.) contaminated by mining tailings, located in Shaoxing, China was carried out to evaluate the effects of applications...A field demonstration of reduction of lead availability in a soil and cabbage (Brassica Chinensis L.) contaminated by mining tailings, located in Shaoxing, China was carried out to evaluate the effects of applications of phosphorus fertilizers on Pb fractionation and Pb phytoavailability in the soil. It was found that the addition of all three P fertilizers including single super phosphate (SSP), phosphate rock (PR), and calcium magnesium phosphate (CMP) significantly decreased the percentage of water-soluble and exchangeable (WE) soil Pb and then reduced the uptake of Pb, Cd, and Zn by the cabbage compared to the control (CK). The results showed that the level of 300 g P/m2 soil was the most cost-effective application rate of P fertilizers for reducing Pb availability at the first stage of remediation, and that at this P level, the effect of WE fraction of Pb in the soil de- creased by three phosphorus fertilizers followed the order: CMP (79%)>SSP (41%)>PR (23%); Effectiveness on the reduction of Pb uptake by cabbage was in the order: CMP (53%)>SSP (41%)>PR (30%). Therefore our field trial demonstrated that it was effective and feasible to reduce Pb availability in soil and cabbage contaminated by mining tailings using P fertilizers in China and PR would be a most cost-effective amendment.展开更多
Rice blast is the most important and destructive crop disease in rice paddies and poses a continued threat to the production of rice(Rossman et al,1990;Khush,2005;Wang et al,2018;Chen et al,2019).Biological control is...Rice blast is the most important and destructive crop disease in rice paddies and poses a continued threat to the production of rice(Rossman et al,1990;Khush,2005;Wang et al,2018;Chen et al,2019).Biological control is given increasing attentions on the control of rice blast for its outstanding advantages,such as safety,low-cost,and sustainability and environmentally friendly attributes.Streptomyces Waksman&Henrici is an important actinomycete genus that is well known for its biological control potential.S.araujoniae is a relatively new species and known for its antagonistic effects against many phytopathogenic fungi(da Silva et al,2013).However,there is no report about the antagonistic efiect of S.araujoniae on Magnaporthe oryzae,much less the disease control effects at the field experiment level.展开更多
基金Project (No. 40432004) supported by the National Natural ScienceFoundation of China and the Science & Technology Foundation(2004) of Zhejiang Province, China
文摘A field demonstration of reduction of lead availability in a soil and cabbage (Brassica Chinensis L.) contaminated by mining tailings, located in Shaoxing, China was carried out to evaluate the effects of applications of phosphorus fertilizers on Pb fractionation and Pb phytoavailability in the soil. It was found that the addition of all three P fertilizers including single super phosphate (SSP), phosphate rock (PR), and calcium magnesium phosphate (CMP) significantly decreased the percentage of water-soluble and exchangeable (WE) soil Pb and then reduced the uptake of Pb, Cd, and Zn by the cabbage compared to the control (CK). The results showed that the level of 300 g P/m2 soil was the most cost-effective application rate of P fertilizers for reducing Pb availability at the first stage of remediation, and that at this P level, the effect of WE fraction of Pb in the soil de- creased by three phosphorus fertilizers followed the order: CMP (79%)>SSP (41%)>PR (23%); Effectiveness on the reduction of Pb uptake by cabbage was in the order: CMP (53%)>SSP (41%)>PR (30%). Therefore our field trial demonstrated that it was effective and feasible to reduce Pb availability in soil and cabbage contaminated by mining tailings using P fertilizers in China and PR would be a most cost-effective amendment.
基金supported by the National Key Research and Development Program of China(Grant No.2018YFD0200304)the Key Research and Development Program of Zhejiang Province(Grant No.2019C02018)SinograinⅡ:Technological Innovation to support environmentally friendly food production and food safety under a changing climate-opportunities and challenges for Norway-China cooperation。
文摘Rice blast is the most important and destructive crop disease in rice paddies and poses a continued threat to the production of rice(Rossman et al,1990;Khush,2005;Wang et al,2018;Chen et al,2019).Biological control is given increasing attentions on the control of rice blast for its outstanding advantages,such as safety,low-cost,and sustainability and environmentally friendly attributes.Streptomyces Waksman&Henrici is an important actinomycete genus that is well known for its biological control potential.S.araujoniae is a relatively new species and known for its antagonistic effects against many phytopathogenic fungi(da Silva et al,2013).However,there is no report about the antagonistic efiect of S.araujoniae on Magnaporthe oryzae,much less the disease control effects at the field experiment level.
