Philosophy and mechanics of how we arrive at fertilizer and lime recommendations     

《Communications in Soil Science and Plant Analysis》2012,43(2):117-126

Abstract

Our experience in soil analysis work began 40 years ago. In those early stages, this was part time work. Most of it stemmed from farm managers and large farm operations. For the past 30 years, soil analysis has been a major program with us.  相似文献   

应用VITEK2全自动微生物鉴定系统检测养殖用水中的大肠杆菌     

陈雪华 《热带作物学报》2012,32(5):76-80

采用国家相关的检验养殖用水标准方法、API 20E微生物生化试验、VITEK2全自动微生物鉴定系统，对养殖用水样品进行了大肠杆菌的检测方法比较和鉴定。VITEK2鉴定系统自动打印的实验报告和API 20E微生物生化试验的判读比对结果显示：3个参试样品分别为阴沟肠杆菌、产气肠杆菌和大肠埃希菌，VITEK2与API 20E两种方法的鉴定结果符合率100%。从实验可知，利用VITEK2全自动微生物鉴定系统，对被污染的养殖用水中细菌源的鉴定速度快，方法简便，结果准确、实用。此方法也可用于各种污染环境及食品污染源的  相似文献   

“大规格绿化苗木”批量检验方法初探     

冉军  骆晓铭  陈继恩 《四川林业科技》2010,31(4):106-108

近年来,随着我国城市及道路绿化的建设发展,对工程质量及苗木规格要求不断提高,"大规格绿化苗木"在许多绿化工程中得到广泛应用。由于此类苗木单价高,几乎占了整个工程造价的一半以上,在工程管理中稍有不慎,便会给整个工程质量造成极大的影响。本文就传统的检验方法与新的检验方法实效进行对比分析,并结合多来年绿化工程施工及管理工作的实践经验,就"大规格绿化苗木"的批量检验方法及其应用作一探讨。  相似文献   

住房抵押贷款风险控制实证研究——基于中国银行某分行的数据分析     

龙海明  唐海龙  欧阳娟 《湖南农业大学学报(自然科学版)》2010,(5):29-33

王先谦的《荀子集解》一书，是晚清诸子学的一部重要著述，是研究和整理《荀子》一书的集大成之作。王氏的学术成就主要体现在两个方面：一是他吸纳了清代学者中研究和整理杨倞注《荀子》一书最有代表性的成果，并对各家之说作了一个梳理和辨析；二是他个人对《荀子》以及杨注的校勘、注释、考辨等方面超出了前人的成就。  相似文献   

泗阳县玉米测土配方施肥试验     

田胜营  吕秀敏  董磊 《现代农业科技》2023,(21)

为明确测土配方技术在泗阳地区玉米生产过程中的实际效果，通过田间试验对玉米生育期、产量构成和效益等进行了对比分析。试验结果显示：采用14.8-9-8的肥料配比能显著提升玉米肥料利用率，提高产量和收益。相较常规施肥，测土配方施肥对玉米生育期影响较小，但玉米穗粒数和千粒重提升效果显著，分别提升了1.88%和3.89%；测土配方施肥的氮、磷、钾肥利用率和养分平均利用率分别为40.77%、28.02%、51.18%，相较常规施肥分别提升了11.55%、4.07%、21.46%，养分平均利用率提升了12.36%；测土配方施肥籽粒产量为9535.04kg/ha，相较常规施肥增产429.99kg，增产率为4.72%，纯收益每公顷提升1269.60元。  相似文献   

落叶松规格材加工利用技术研究     

叶克林  吕建雄 《木材工业》2010,24(6)

介绍"十一五"国家科技支撑计划"高强度结构材加工利用技术"课题中,对我国主要的商品林树种之一——落叶松,在规格材的优化加工、分级、无损检测、强度性能测试及木构件连接等关键技术研究方面,取得的重点创新成果。这些成果开创性地解决了我国利用国产资源加工结构用规格材的关键性和共性技术问题,并且为我国落叶松资源的高效利用,提供了新的技术途径。  相似文献   

15种杀虫杀螨剂对皮氏叶螨的毒力测定     

苏振国  张方平  韩冬银  符悦冠 《热带作物学报》2010,30(3):18-20

采用玻片浸渍法，对15种杀虫杀螨剂对香蕉皮氏叶螨的室内毒力进行了测定。结果表明：供试药剂中以阿维菌素对皮氏叶螨的雌成螨的毒力为最高，LC50为0.005 5 mg/L，其次为鱼藤酮，LC50为0.017 3 mg/L，毒力最低的为吡虫啉，LC50为113.101 4 mg/L；15种供试药剂对皮氏叶螨的毒力大小顺序依次为：阿维菌素＞鱼藤酮＞唑螨酯＞哒螨灵＞毒死蜱＞辛硫磷＞高氯苯＞联苯菊酯＞功夫＞螺螨酯＞甲氰菊酯＞丙溴磷＞敌敌畏＞炔螨特＞吡虫啉。  相似文献   

Use of regression analysis for converting quicktest‐measured lime and fertilizer recommendations into actual values based on longer equilibration times     

《Communications in Soil Science and Plant Analysis》2012,43(10):891-897

Abstract

Soil tests should produce data useful for making accurate lime and fertilizer recommendations aimed at optimizing chemical conditions for plant growth or providing available nutrient levels sufficient for maximum yields. In order to attain these objectives, we believe, quicktest‐computed rates have to be made equivalent to actual values through a regression adjustment. Although it may not be most desirable to use this adjustment for each new population of soils, it may be worse to try to use a function derived from one group of soils on a second group not well represented by the first.  相似文献   

Application of polyclonal and monoclonal antibodies for the detection of Xanthomonas campestris pv. campestris in crucifer seeds using immunofluorescence microscopy     

A. A. J. M. Franken 《European journal of plant pathology / European Foundation for Plant Pathology》1992,98(2):95-106

Polyclonal and monoclonal antibodies (PCAs and MCAs) were tested for the detection ofXanthomonas campestris pv.campestris (Xcc) in cabbage seeds using immunofluorescence microscopy (IF). It was concluded that PCA 94, MCAs 20H6, 2F4, 18G12 and a mixture of MCAs 20H6, 18G12, 2F4 and 16B5 could be used to detect Xcc in seed extracts when 5 min and 2.5 h shaking of seeds are used as extraction methods. The reliability of confirming suspect colonies with MCAs and PCA 94 in IF depended in part on the seed lot tested and the antibody used. Some virulent Xcc strains derived from seed lots, did not react with MCAs 10C5, 2F4, 18G12, 17C12 and 16B5. On the other hand, saprophytic isolates obtained from one seed lot cross-reacted with MCA 17C12 and to a lesser extent with MCAs 2F4, 18G12 and PCA 94. No relationship was found between IF-reactions of Xcc strains using MCAs and reactions of Xcc strains in pathogenicity testing. Xcc andX. c. pv.amoraciae (Xca) could in general not be distinguished on the basis of reactions with MCAs and PCAs. Also in pathogenicity tests Xcc and Xca were hard to distinguish.  相似文献   

油菜优化测土施肥中土壤供氮量的研究     

连楚楚  沈润平 《江西农业大学学报》1994,16(1):20-24

  相似文献