Dissipation of tiafenacil in five types of citrus orchard soils using the HPLC‐MS coupled with the quick, easy, cheap, effective, rugged, and safe method

2021 ◽  
Author(s):  
Meizhu Gao ◽  
Chuanfei Bian ◽  
Wenwen Zhou ◽  
Lang Liu ◽  
Baotong Li ◽  
...  
Keyword(s):  
Citrus Orchard ◽  
Safe Method ◽  
Orchard Soils

Allelochemicals and their transformations in the Ageratum conyzoides intercropped citrus orchard soils

2004 ◽  
Vol 264 (1/2) ◽  
pp. 149-157 ◽  
Author(s):  
Chuihua Kong ◽  
Wenju Liang ◽  
Fei Hu ◽  
Xiaohua Xu ◽  
Peng Wang ◽  
...  
Keyword(s):  
Ageratum Conyzoides ◽  
Citrus Orchard ◽  
Orchard Soils

scholarly journals Degradation Dynamics of Glyphosate in Different Types of Citrus Orchard Soils in China

Molecules ◽  
2015 ◽  
Vol 20 (1) ◽  
pp. 1161-1175 ◽  
Author(s):  
Changpeng Zhang ◽  
Xiuqing Hu ◽  
Jinyan Luo ◽  
Zhiyi Wu ◽  
Li Wang ◽  
...  
Keyword(s):  
Citrus Orchard ◽  
Different Types ◽  
Orchard Soils

scholarly journals Bacterial Diversity and Community in Response to Long-Term Nitrogen Fertilization Gradient in Citrus Orchard Soils

Diversity ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 282
Author(s):  
Yu Wan ◽  
Wenjie Li ◽  
Jie Wang ◽  
Xiaojun Shi
Keyword(s):  
Bacterial Community ◽  
Bacterial Diversity ◽  
Relative Abundance ◽  
Nitrogen Fertilizer ◽  
Citrus Orchard ◽  
Fertilizer Rate ◽  
Nitrogen Fertilizer Rate ◽  
Citrus Orchards ◽  
Orchard Soils

Citrus orchards receive increasing amounts of nitrogen fertilizer for the purpose of optimal yields and good quality of citrus fruits. Although the effects of increased nitrogen fertilizer on citrus fruit trees have been reasonably well studied, few comparable studies have examined impacts on soil bacterial communities and diversity, even though they play critical roles in orchard ecosystem functioning. In our study, Illumina MiSeq sequencing was used to investigate bacterial community structure and diversity under 5-years long-term nitrogen fertilization gradients (N0, N1, N2, N3, N4, and N5) in citrus orchard soils. The sequencing result showed that nitrogen fertilizer addition increased bacterial diversity along the N0 to N3 gradient but decreased bacterial diversity along the N3 to N5 gradient. The increase in the nitrogen fertilizer rate altered bacterial community composition by increasing the relative abundance of Delta-proteobacteria, Nitrospirae, SBR1093, and Latescibacteria and decreasing the relative abundance of Alpha-proteobacteria. Finally, regression analysis revealed that bacterial diversity and the relative abundance of Nitrosomonadales, Rhodobiaceae, Gemmatimonas, and Variibacter exhibited a significant positive correlation with citrus yield. The study revealed that a reasonable nitrogen fertilizer rate applied to citrus orchards could improve bacterial community structure and diversity and increase citrus yield.

Types of Stressors on Nonprofessional Against-Suicide and Pro-Suicide Message Boards

Crisis ◽  
2019 ◽  
Vol 40 (4) ◽  
pp. 257-264 ◽  
Author(s):  
Thomas Niederkrotenthaler ◽  
Benedikt Till
Keyword(s):  
Content Analysis ◽  
Interpersonal Problems ◽  
Suicide Method ◽  
Presenting Problems ◽  
Message Boards ◽  
Safe Method ◽  
Different Types ◽  
Psychiatric Problems

Abstract. Background: Little is known about presenting problems of primary posters (i.e., posters opening the thread) and their responders in nonprofessional against-suicide and pro-suicide message boards. Aims: We aimed to compare problems described in suicide message boards between different types of users (primary posters and respondents) and between against-suicide, neutral, and pro-suicide message boards. Method: In all, 1,182 archival threads with 20,499 individual postings from seven nonprofessional suicide message boards supporting an against-suicide, neutral, or pro-suicide attitude were randomly selected. Problems mentioned by primary posters and their respondents were coded with content analysis. Differences between pro-suicide, neutral, and against suicide boards, as well as correlations between primary posters and respondents, were calculated. Results: Interpersonal problems were most frequently mentioned by primary posters in against-suicide threads (40.9%) and less frequently in pro-suicide threads (11.8%; p < .001). In pro-suicide boards, the most frequent stressors were suicide method-related (e.g., how to identify a safe method: 26.2% vs. 2.5% in against-suicide boards, p < .001). Primary posters resembled respondents in terms of presenting problems in pro-suicide boards, but not in against-suicide boards. Limitations: Only self-reported problems were assessed. Conclusion: The results confirm a stronger focus on death than on life among users in pro-suicide message boards, and posters with similar problems meet in pro-suicide boards. The posters appear to clearly emphasize social strains over psychiatric problems compared with some professional settings.

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