万载县有机木姜生产技术规程

<正>1范围本标准规定了有机木姜生产技术要求,包括土壤、空气、水源以及木姜产品质量、运输、储存等。本标准适用于万载有机木姜的生产、运输及储存。     

滨海稻区排水条件对水稻生长的影响

通过田间和盆栽试验,研究滨海稻区排水条件对水稻生长的影响。结果表明,排水毛渠能降低地下水位10cm以上,增加田间渗漏约2mm/昼夜。有效地改善了耕层土壤环境,促进了水稻生长发育,有利于水稻高产。     

设施蔬菜的施肥原则与方法

施肥是设施蔬菜生产中的一项关键技术,它直接关系到蔬菜生产的产量和品质的提高,因为设施蔬菜不同于常规露地生产,它多为反季节栽培,对肥水管理等有特殊的     

佛山市南海区菜地化肥使用现状及对策

通过对佛山市南海区耕地地力的调查,系统论述了南海区菜地化肥使用现状和存在问题,并提出加强耕地地力建设与质量保护、提高科学施肥、保障绿色食品蔬菜质量安全、加快蔬菜业发展的对策。     

日本大葱对土壤环境要求与无公害施肥技术

介绍生产优质、高产、安全的日本大葱对土壤环境的要求及无公害施肥技术。     

苏南地区土壤重金属向蔬菜的迁移研究

Vegetable fields in peri-urban areas receive large amounts of extraneous heavy metals because of rapid urbanization and industrialization in China. The concentrations of Cu, Zn, and Pb in 30 soil samples and 32 vegetable samples, collected from 30 different sites in southern Jiangsu Province of China, were measured and their transfer from soil to vegetable was determined. The results showed that the soil samples had wide ranges of pH (4.25-7.85) and electrical conductivity (EC) (0.24-3.42 dS m^-1). Among the soil samples, there were four soil samples containing higher Cu and two soil samples containing higher Zn concentrations than those specified in the Chinese Soil Environmental Quality Standard II. However, no vegetable sample was found to contain a high level of Cu or Zn. In contrast, one vegetable sample contained 0.243 mg Pb kg^-1 FW, which was above the Chinese Food Hygiene Standard, whereas the corresponding soil Pb concentration was lower than the Chinese Soil Environmental Quality Standard II. The transfer coefficients of Cu of all vegetable samples exceeded the suggested coefficient range, implying that extraneous Cu had high mobility and bioavailability to vegetables. There was no significant correlation between extractable soil heavy metal concentrations with four kinds of extractants and soil pH, EC, heavy metal concentrations in vegetables and soils, except that soil pH correlated well with the extractable soil Cu, Zn, and Pb concentrations with 1.0 mol L^-1 NH₄NO₃. Moreover, diethylenetriamine pentaacetic acid (DTPA) extraction method was a more effcient method of extracting heavy metals from the soils independent of soil pH and EC than other three methods used.     

免耕对土壤环境的影响研究

免耕是一种高产节源栽培技术,已成为现代农业主要的耕作方式之一.相关研究表明,免耕可降低劳动强度、减少机械损耗、减少土壤侵蚀、迅速改善土壤的理化性状、增强土壤肥力、促进作物生长、提高农业生产率,从而促进农业生产.为此,就免耕对土壤环境的影响进行了综述,并展望了其应用前景和发展方向.     

西沙群岛土壤环境质量状况及特征分析

[目的]研究西沙群岛土壤环境的质量状况和特征。[方法]通过对西沙群岛各岛采集土样的分析检测,分析了西沙群岛土壤环境特征和存在的主要问题,并进行土壤环境质量评价。[结果]西沙群岛土壤有机质含量较高,土壤的机械组成以砂粒为主,粉粒和粘粒含量很低。各元素含量差异较大,空间分布不均衡。永兴岛机场附近土壤中Cd超标严重,超标倍数达1.00。赵述岛Se超标倍数达5.20,对岛屿的土壤环境造成污染。[结论]该研究为南海诸岛的其他海岛土壤环境质量和特征分析提供参考。     

有机肥在烟叶生产中的应用及施用策略

有机肥因其独特的养分优势越来越受到烟草农业生产的重视,其施用合理与否直接关系到烟草的生长发育,影响烟叶的产量及品质。分析我国烟叶生产中施用有机肥的迫切性、有机肥养分特点和其对烟田土壤环境、烟草生长发育及烟叶品质的影响,提出有机肥使用不当所带来的潜在问题,并对烟草生产中有机肥的利用提出合理的策略,以期为烟草生产中发挥有机肥的积极作用提供理论和事实依据。     

蔡伦中科有机无机复混肥

技术指标氮、磷、钾含量≥25.0%有机质含量≥20.0%腐殖酸含量≥8.0%微量元素含量≥0.3%。适用作物所有蔬菜、果树、瓜类、中草药、花卉等经济作物及粮食作物。产品特点(1)有机、无机相结合,肥效快,肥力均匀持久。(2)配方科学、比例合理,能够满足作物生长发育的各种养分需求,避免养分浪费。(3)改善土壤环境,提高肥料利用率,平均可提高15%以上。(4)明显改善作物品质,