[Objective] The aim of this study was to investigate the impacts of slow and controlled release fertilizers（SCRF）on the yield of qiubei hot pepper,its nutrient use efficiency and environment.[Method] Using Qiubei ho...[Objective] The aim of this study was to investigate the impacts of slow and controlled release fertilizers（SCRF）on the yield of qiubei hot pepper,its nutrient use efficiency and environment.[Method] Using Qiubei hot pepper（Capsicum frutescens L.）as the experimental material,we studied the fertilization effect and environment-protecting effect of SCRF.[Result] The result showed that SCRF could improve the agronomic characteristics of hot pepper.Compared to singly applied common fertilizers,SCRF increased economic yield by 20.90% and economic benefit by 13 234.35 Yuan/hm2,and the ratio of output to input was improved by 47.93%.In comparison with common straight fertilizers at same NPK proportion and rate,SCRF increased economic yield by 5.26% and economic benefit by 5 554.80 Yuan/hm2,and the ratio of output to input was improved by 9.91%.Under the reduced use of SCRF by 20%,SCRF increased economic yield by 12.38% and economic benefit by 9595.20 Yuan/hm2 compared with singly applied common fertilizers,and the ratio of output to input was improved by 65.95%.SCRF improved nitrogen,phosphorus and potassium use efficiencies by 12.42-17.53,3.35-5.24 and 5.37-14.02 percents respectively.[Conclusion] As the result of much reduced N and P application rates,SCRF would significantly economize fertilizer resources and minimize the pollution caused by the loss of fertilizer nutrients,which is of practical importance for environment protection.展开更多
Storage and transportation of vegetable commercial seedlings becomes an important link along with the continuous expansion of planting areas of facility vegetables and vegetable seedling culture industry. In this stud...Storage and transportation of vegetable commercial seedlings becomes an important link along with the continuous expansion of planting areas of facility vegetables and vegetable seedling culture industry. In this study,pepper variety‘Nongda 24' was as the experimental material,and changes in the morphological and physiological indicators of plug seedlings in different low temperature( 6 and 11℃) and poor light environments were studied to find suitable storage environmental conditions. The results showed that pepper seedlings could be stored and transported for 14 days when storage temperature was 11℃ and light conditions such as light intensity and photoperiod were 30 μmol/( m^2·s)and 12 h/d by using a fluorescent lamp with R∶ B ratio of 1. 9,and 15 μmol/( m^2·s) and 24 h/d by using LED with R∶ B ratio of 1. 3,respectively. Moreover,the quality of pepper seedlings could be protected effectively. Compared to the fluorescent lamp,LED with high luminous efficiency and low energy consumption was suitable for the storage or long-distance transportation of pepper seedlings in low temperature and poor light environments.展开更多
Pepper(Capsicum spp.)is one of the most important vegetable crops;however,pepper genomic studies lag behind those of other important Solanaceae.Here we present the results of a high-throughput genotyping-by-sequencing...Pepper(Capsicum spp.)is one of the most important vegetable crops;however,pepper genomic studies lag behind those of other important Solanaceae.Here we present the results of a high-throughput genotyping-by-sequencing(GBS)study of a collection of 190 Capsicum spp.accessions,including 183 of five cultivated species(C.annuum,C.chinense,C.frutescens,C.baccatum,and C.pubescens)and seven of the wild form C.annuum var.glabriusculum.Sequencing generated 6,766,231 high-quality read tags,of which 40.7%were successfully aligned to the reference genome.SNP calling yielded 4083 highly informative segregating SNPs.Genetic diversity and relationships of a subset of 148 accessions,of which a complete passport information was available,was studied using principal components analysis(PCA),discriminant analysis of principal components(DAPC),and phylogeny approaches.C.annuum,C.baccatum,and C.chinense were successfully separated by all methods.Our population was divided into seven clusters by DAPC,where C.frutescens accessions were clustered together with C.chinense.C.annuum var.glabriusculum accessions were spread into two distinct genetic pools,while European accessions were admixed and closely related.Separation of accessions was mainly associated to differences in fruit characteristics and origin.Phylogeny studies showed a close relation between Spanish and Mexican accessions,supporting the hypothesis that the first arose from a main genetic flow from the latter.Tajima’s D statistic values were consistent with positive selection in the C.annuum clusters,possibly related to domestication or selection towards traits of interest.This work provides comprehensive and relevant information on the origin and relationships of Spanish landraces and for future association mapping studies in pepper.展开更多
Fermented foods play an important role in the daily life and diet of the populations in Congo. Among these fermented foods, there is Pilipili or fermented </span><span style="font-family:Verdana;"&g...Fermented foods play an important role in the daily life and diet of the populations in Congo. Among these fermented foods, there is Pilipili or fermented </span><span style="font-family:Verdana;">pepper which is consumed without prior cooking. The microorganisms</span><span style="font-family:Verdana;"> present are eaten alive. Few studies have been carried out on these microorganisms which may have beneficial effects on health. This study aimed to investing taxonomic diversity of bacterial communities in 3 samples of fermented peppers produced in 3 distinct areas of Brazzaville. To do this investigation, Illumina Miseq sequencing of 16S rRNA gene was used. The results showed that the number of identified operational taxonomic units (OTUs) ranged from 156 to 392. All OTUs belong to the domain of Bacteria and could be categorized into 21 Phyla, 36 Classes, 58 Orders, 100 Families and 171 genera. Firmicutes and Proteobacteria were the main dominant phyla of the total phyla present with a relative abundance of 89.12% and 8.08%, respectly. At the class level, Bacili were dominant in EB1 (99.50%), EB3 (85.32%) and EB2 (42.29%) while Clostridia in EB2 (40.10%). Lactobacillus, Clostridium sensu stricto and Frutobacillus were the dominant genera in the sample EB1, EB2 and EB3, respectively. The hierarchical classification showed that the samples EB1 and EB2 form the same group and EB3 is unique. Principal component analysis showed that the younger EB3 and EB2 samples were more diverse than the older EB1 sample. This study is a first in Congo on the diversity of fermented pepper using Illumina Miseq. It has shown that this food is very diverse and can be a source for the isolation of bacteria with biotechnological potential.展开更多
基金Supported by Special Fund for Agro-scientific Research in the Public Interest from Ministry of Agriculture(200903025-05)Fund from Kunming Municipal Science and Technology Committee(08S010201)~~
文摘[Objective] The aim of this study was to investigate the impacts of slow and controlled release fertilizers（SCRF）on the yield of qiubei hot pepper,its nutrient use efficiency and environment.[Method] Using Qiubei hot pepper（Capsicum frutescens L.）as the experimental material,we studied the fertilization effect and environment-protecting effect of SCRF.[Result] The result showed that SCRF could improve the agronomic characteristics of hot pepper.Compared to singly applied common fertilizers,SCRF increased economic yield by 20.90% and economic benefit by 13 234.35 Yuan/hm2,and the ratio of output to input was improved by 47.93%.In comparison with common straight fertilizers at same NPK proportion and rate,SCRF increased economic yield by 5.26% and economic benefit by 5 554.80 Yuan/hm2,and the ratio of output to input was improved by 9.91%.Under the reduced use of SCRF by 20%,SCRF increased economic yield by 12.38% and economic benefit by 9595.20 Yuan/hm2 compared with singly applied common fertilizers,and the ratio of output to input was improved by 65.95%.SCRF improved nitrogen,phosphorus and potassium use efficiencies by 12.42-17.53,3.35-5.24 and 5.37-14.02 percents respectively.[Conclusion] As the result of much reduced N and P application rates,SCRF would significantly economize fertilizer resources and minimize the pollution caused by the loss of fertilizer nutrients,which is of practical importance for environment protection.
基金Supported by National Key Research and Development Program of China(2017YFB0403901)
文摘Storage and transportation of vegetable commercial seedlings becomes an important link along with the continuous expansion of planting areas of facility vegetables and vegetable seedling culture industry. In this study,pepper variety‘Nongda 24' was as the experimental material,and changes in the morphological and physiological indicators of plug seedlings in different low temperature( 6 and 11℃) and poor light environments were studied to find suitable storage environmental conditions. The results showed that pepper seedlings could be stored and transported for 14 days when storage temperature was 11℃ and light conditions such as light intensity and photoperiod were 30 μmol/( m^2·s)and 12 h/d by using a fluorescent lamp with R∶ B ratio of 1. 9,and 15 μmol/( m^2·s) and 24 h/d by using LED with R∶ B ratio of 1. 3,respectively. Moreover,the quality of pepper seedlings could be protected effectively. Compared to the fluorescent lamp,LED with high luminous efficiency and low energy consumption was suitable for the storage or long-distance transportation of pepper seedlings in low temperature and poor light environments.
基金financed by INIA projects RTA2013-00022-C02,RTA2014-00041-C02-02,and RF2010-00025-00-00,FEDER funds.
文摘Pepper(Capsicum spp.)is one of the most important vegetable crops;however,pepper genomic studies lag behind those of other important Solanaceae.Here we present the results of a high-throughput genotyping-by-sequencing(GBS)study of a collection of 190 Capsicum spp.accessions,including 183 of five cultivated species(C.annuum,C.chinense,C.frutescens,C.baccatum,and C.pubescens)and seven of the wild form C.annuum var.glabriusculum.Sequencing generated 6,766,231 high-quality read tags,of which 40.7%were successfully aligned to the reference genome.SNP calling yielded 4083 highly informative segregating SNPs.Genetic diversity and relationships of a subset of 148 accessions,of which a complete passport information was available,was studied using principal components analysis(PCA),discriminant analysis of principal components(DAPC),and phylogeny approaches.C.annuum,C.baccatum,and C.chinense were successfully separated by all methods.Our population was divided into seven clusters by DAPC,where C.frutescens accessions were clustered together with C.chinense.C.annuum var.glabriusculum accessions were spread into two distinct genetic pools,while European accessions were admixed and closely related.Separation of accessions was mainly associated to differences in fruit characteristics and origin.Phylogeny studies showed a close relation between Spanish and Mexican accessions,supporting the hypothesis that the first arose from a main genetic flow from the latter.Tajima’s D statistic values were consistent with positive selection in the C.annuum clusters,possibly related to domestication or selection towards traits of interest.This work provides comprehensive and relevant information on the origin and relationships of Spanish landraces and for future association mapping studies in pepper.
文摘Fermented foods play an important role in the daily life and diet of the populations in Congo. Among these fermented foods, there is Pilipili or fermented </span><span style="font-family:Verdana;">pepper which is consumed without prior cooking. The microorganisms</span><span style="font-family:Verdana;"> present are eaten alive. Few studies have been carried out on these microorganisms which may have beneficial effects on health. This study aimed to investing taxonomic diversity of bacterial communities in 3 samples of fermented peppers produced in 3 distinct areas of Brazzaville. To do this investigation, Illumina Miseq sequencing of 16S rRNA gene was used. The results showed that the number of identified operational taxonomic units (OTUs) ranged from 156 to 392. All OTUs belong to the domain of Bacteria and could be categorized into 21 Phyla, 36 Classes, 58 Orders, 100 Families and 171 genera. Firmicutes and Proteobacteria were the main dominant phyla of the total phyla present with a relative abundance of 89.12% and 8.08%, respectly. At the class level, Bacili were dominant in EB1 (99.50%), EB3 (85.32%) and EB2 (42.29%) while Clostridia in EB2 (40.10%). Lactobacillus, Clostridium sensu stricto and Frutobacillus were the dominant genera in the sample EB1, EB2 and EB3, respectively. The hierarchical classification showed that the samples EB1 and EB2 form the same group and EB3 is unique. Principal component analysis showed that the younger EB3 and EB2 samples were more diverse than the older EB1 sample. This study is a first in Congo on the diversity of fermented pepper using Illumina Miseq. It has shown that this food is very diverse and can be a source for the isolation of bacteria with biotechnological potential.
