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Effects of Different planting years on Physicochemical Properties and Enzyme Activities in Soil of Rice-Cherry Tomato Rotation

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Open Journal of Ecology 2023年第6期13卷 334-344页

作者： Xiao Deng Chunyuan Wu Yi Li Huadong Tan Jiancheng Su Environmental and Plant Protection Institute Chinese Academy of Tropical Agricultural Sciences Haikou China Hainan Danzhou Tropical Agro-Ecosystem National Observation and Research Station Danzhou China Key Laboratory of Low-Carbon Green Agriculture in Tropical Region of China Ministry of Agriculture and Rural Affairs Haikou China Hainan Key Laboratory of Tropical Eco-Circular Agriculture Haikou China National Agricultural Experimental Station for Agricultural Environment National Long-Term Experimental Station for Agriculture Green Development Danzhou China Hainan Star Farmer Ecological Technology Co. Ltd. Haikou China

Crop rotation periodicity has always been one of the research focuses currently. In this study, the physicochemical properties, nutrient contents and enzyme activities were investigated in soils from rice-cherry tomato rotation for one year (1a), three years (3a), five years (5a), seven years (7a) and ten years (10a), respectively. The major objective was to analyze the optimal rotation years of rice-cherry tomato from soil perspective, so as to provide theoretical basis for effectively avoiding continuous cropping obstacles of cherry tomato via studying the response characteristics of soil physicochemical properties, nutrient contents and enzyme activities to planting years of rice-cherry tomato rotation system. The results were as follows: 1) Soil pH value was increased year by year during 1a to 5a, reached the highest value 5.32 at 5a. However, soil acidity was sharply enhanced during 7a to 10a (P P •kg-1 at 5a. 3) The content of soil available phosphorus was increased year by year with increasing of crop rotation years, and increased by 110% to 173% during 3a to 10a (P P P < 0.05). In conclusion, long-term single rotation pattern of rice-cherry tomato would aggravate soil acidification, prompt soil nutrient imbalance and reduce soil enzyme activity. 5a to 7a would be the appropriate rotation period for rice-cherry tomato, or else it would reduce soil quality, resulting in a new continuous cropping obstacle of cherry tomato.

关键词： Rice-Cherry Tomato Rotation planting years Soil Physicochemical Properties Enzyme Activity

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Nutrient Accumulation Characteristics of Facility Soils with Different planting years in Lateritic Red Soil Region of Guangxi

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Asian Agricultural Research 2022年第5期14卷 47-50页

作者： Guifen CHEN Yanfei HUANG Mei PANG Yuyi HUANG Bin LIU Xiuhe ZHAO Xiaoqing OU Yueyue ZHOU Liumei XIONG Agricultural Resource and Environment Research Institute Guangxi Academy of Agricultural Sciences Nanning 530007 China Agricultural Research Institute of Beihai Beihai 536000 China

[Objectives]To explore the nutrient accumulation characteristics of facility soil in different planting years in the lateritic red soil region of Guangxi.[Methods]The soil samples of facility cultivation and open field cultivation were collected in the lateritic red soil region of Guangxi,and the changes of soil pH,water-soluble salts,organic matter,available nutrients and total nutrients were analyzed.[Results]The acidification of the facility soil in the lateritic red soil region of Guangxi became more obvious with the extension of greenhouse planting years,the soil pH decreased by 0.34 units after continuous planting for 10 years,and the water-soluble content was more than 3 times that of the open field and it increased with the extension of the planting *** addition,the degree of secondary salinization in facility soil became more serious,mainly moderate and mild *** contents of soil organic matter,alkali-hydrolyzed nitrogen,available phosphorus,available potassium,total nitrogen and total phosphorus in the facility soil increased significantly,while total potassium did not change significantly.[Conclusions]This study is expected to provide a scientific basis for facility soil fertilization management,and to promote the sustainable and healthy development of facility cultivation industry.

关键词： Facility soil planting years Nutrient accumulation Acidification Salinization

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Variations of soil quality from continuously planting greenhouses in North China

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International Journal of Agricultural and Biological Engineering 2019年第1期12卷 139-145页

作者： Jing Li Yan Xu Hongguang Liu Key Laboratory of Ecosystem Network Observation and Modelling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China College of Resources and Environment University of Chinese Academy of SciencesBeijing 100190China Key Laboratory of Modern Water-Saving Irrigation of Xinjiang Production&Construction GroupCollege of Water Conservancy&Architectural EngineeringShihezi UniversityXinjiang 832000China

Vegetable greenhouses form a significant land utilisation pattern in China.A case study of the greenhouse soil quality changes and potential risk to humans under a specific long-term environment,which includes high fertilization rates,high temperatures and humidity levels and out-of-season cultivation,is presented in this *** profiles of 72 representative solar greenhouses with various planting years were sampled in Shouguang City,which is the birthplace of winter greenhouse in *** temporal distribution of soil quality changes were quantitatively evaluated through the application of a correlation analysis and soil quality *** soil was highly enriched with phosphorus and potassium and had low organic matter *** organic matter,nitrogen,phosphorus and potassium contents increased with the years planted,reached their peak values after 5-10 a,and declined as the soil layer’s depth *** infiltration rate of nitrate was relatively high,which poses risks to underground water safety.A comprehensive soil quality assessment revealed that in vegetable greenhouses planted for different periods,the soil quality improved at first and then sharply declined after 10 *** greenhouse soil quality changes will aid in implementing nutrient management strategies to improve the soil quality and sustainable development programs for the vegetable industry.

关键词： vegetable greenhouse facility agriculture planting years soil quality microbial activity

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Age Structure and Change Trend of Tobacco Farmers:A Case Study of Shashi Town,Liuyang City,Hunan Province

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Asian Agricultural Research 2023年第8期15卷 8-15页

作者： Jianwen WANG Liangjiao LIU Zhengguang ZHAI Zhiqiang DENG Tao ZHU Sihan HUANG Changsha Tobacco Company Liuyang Branch Changsha 410302China Changsha Tobacco Company Changsha 410600China PublicAdministration and Law College Hunan Agricultural UniversityChangsha 410128China Changsha Tobacco Company Ningxiang Branch Changsha 410600China

Taking the tobacco-growing area of Shashi Town,Liuyang City as the object,the number of registered,newly added and resigned tobacco farmers in each year,average age,number and proportion of tobacco farmers of different ages,number and proportion of tobacco farmers born in different eras,as well as planting scale and planting history of flue-cured tobacco in the last 10 years were analyzed *** results showed that the number of tobacco farmers in Shashi Town showed a rapid decline trend from 2012 to 2018,while the average age continuously increased,and the average planting scale rose in a wave like *** 2019 to 2021,the decline rate of the number of tobacco farmers slowed down,and the average planting scale continuously increased,while the aging of tobacco farmers ***,the birth years of tobacco farmers were further concentrated in the 1960s,and they were mainly at the age of *** tobacco industry in Shashi Town of Liuyang City is facing the crisis of aging tobacco farmers and no successor of flue-cured tobacco planting,and it is predicted that the next 5-10 years will continue the change trend from 2019 to 2021.

关键词： Tobacco farmers Number Birth year Average age planting years Change trend Prediction

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