双膜棉的生长优势及高产栽培技术

双膜棉的生长优势及高产栽培技术①张光琦宋述涛湖北省潜江市农技推广中心４３３１００双膜棉又叫移栽地膜棉，即采用塑料薄膜营养钵育苗，大田地膜覆盖移栽，是棉花营养钵育苗移栽与地膜棉相结合的一种新的栽培技术体系。我市双膜棉栽培始于１９９４年，１９９５年扩大示...     

移栽地膜棉高产群体质量指标及其调控技术

移栽地膜棉高产群体质量指标及其调控技术管信山，陆马培，龚善，李华江苏省如东县农业局２２６４００顾禄泉江苏省如东县气象局２２６４００移栽地膜棉即薄膜营养钵育苗，大田期覆盖地膜移栽，是充分挖掘棉花内在生产潜力，提高单产，增加植棉效益的一项高产栽培技术。为...     

简述江西省近30年来棉花栽培技术六大创新

总结江西省近30年来棉花生产上的成功经验,归纳概述了棉花生产栽培技术上的地膜覆盖植棉技术、营养钵育苗移栽技术、优质高产配套技术、棉田高效套种技术、棉花节本栽培技术、基质育苗裸苗移栽技术六大创新。其中节本栽培技术中还包含多年免耕技术、化学除草技术、轻简施肥技术、化学调控技术和行株距配置改良技术等。     

棉花夺高产,过好育苗移栽关

棉花夺高产，过好育苗移栽关肖望舒，伍琦（江西省棉花研究所九江３３２１０５）根据棉花营养钵育苗移栽一般规律，综合生产上运用的常规和新技术、特提出如下几条技术措施。ｌ。搞好营养钵育苗，争苗早齐匀全壮。１。，ｌｄｅＢ％足苗东面积．制好大田移栽营养钵。一落床...     

移栽地膜棉高产栽培技术要点

移栽地膜棉高产栽培技术要点①韩昌友湖北荆沙市农牧局４３４１００移栽地膜棉是将棉花营养钵育苗移栽和棉花地膜覆盖栽培二者结合起来的栽培方式。１９９１年荆沙市开始示范推广，１９９５年全市已发展到３．２９万ｈｍ２，占棉田总面积的２５．４％，平均皮棉单产达１５...     

赣北棉区地膜移栽棉的关键栽培技术

为了解决赣北棉区棉花迟发问题，进一步挖掘棉花增产潜力，在全面普及营养钵双膜覆盖育苗、争早苗壮苗的基础上，引用了地膜移栽技术，以实现壮苗早发、优质高产。１地膜移栽在赣北棉区示范的反映从两年示范推广的情况看，棉花地膜移栽是一项优势明显、缺点突出的栽培技术...     

皖南棉区棉花营养钵育苗技术

阐述了棉花营养钵育苗移栽的主要优点,从选择苗床、适时播种、精细管理、及时移栽等方面详细介绍了适合长江流域棉区应用的棉花营养钵育苗技术,以指导棉花生产夺取高产.     

苏沿海棉花无土育苗栽培技术的实践与思考

江苏省射阳县是全国重点产棉县之一。应用20多年的棉花营养钵育苗移栽及其配套栽培技术为射阳县棉花增产增收发挥了巨大作用。但近年来,随着农村劳动力大量转移,繁重的棉花营养钵育苗已成了影响棉花发展的瓶颈。通过调查考察棉花无土育苗、移栽的轻简栽培技术,十分符合棉花生产发展方向。对此,作者对该项技术进行了认真实践和思考。     

棉花水浮育苗技术在湖北潜江的应用与效果

通过在湖北省潜江市棉区设立水浮育苗移栽与传统营养钵育苗移栽的对比试验和示范，结果表明：棉花水浮育苗技术具有省种、省工、省地和出苗率高，移栽成活率高，中后期生长快，成铃数多的优点，是一种轻简化栽培技术，适合在潜江棉区推广应用。     

国家重大攻关项目棉花“两无”栽培试种成功

棉花“两无”栽培即“无土基质育苗、无钵体移栽”新技术，是国家重大攻关项目，由中国棉花研究所研究发明，获得了农业部棉花高产栽培重大科研成果奖，居同类研究的国际领先水平。据了解，棉花“两无”栽培技术具有抗灾抗病能力强、节省用工、育苗成本低、丰产性好等特点，在棉花生长、结桃、产量上都比营养钵移栽棉花好。     

豫北优质大豆产业发展策略

针对豫北地区的大豆生产现状，从气候、土壤、品种、生态因素及市场需求等方面提出了优质大豆的发展策略与途径。     

Analysis of nutritional components of eight famine foods of the Republic of Niger

In the western Sahel, indigenous plants become important staples when cereal harvests are inadequate to support populations inhabiting that region of Africa. The purpose of this study was to assess the nutrient content of several of these edible wild plants. The leaves of the following seven plant foods were analyzed: Ziziphus mauritiana, Cerathotheca sesamoides, Moringa oleifera, Leptadenia hastata, Hibiscus sabdarifa, Amaranthus viridi, and Adansonia digitata. The fatty acid, vitamin E, carotenoid, selected mineral and amino acid contents of these plant foods were determined. These same analyses were performed on the fruit of the Adansonia digitata. In quantitative and qualitative terms, Amaranthus viridis was found to be an excellent source of protein. Its amino acid composition compared favorably to that of a World Health Organization (WHO) protein standard. It also contained considerable amounts of the two fatty acids that are essential in humans (linoleic and -linolenic) and a number of minerals including iron, magnesium, calcium and zinc. The leaves of Hibiscus sabdarifa contained an appreciable quantity of protein the composition of which was comparable to the WHO standard. The mineral content of the leaves of this plant was also exceptionally high; noteworthy was its high zinc content. H. sabdarifa also contained significant quantities of the two essential fatty acids. Ziziphus mauritiana was an excellent source of the essential fatty acid linoleic acid and several of the metals including iron, calcium, magnesium and zinc. Its content of other essential nutrients, however, was rather low. In general, Adansonia digitata leaves were nutritionally superior to the fruit of the tree; however, the fruit did contain useful quantities of potassium, phosphorus, zinc and -linolenic acid. The Leptadenia hastata leaves were an especially good source of lutein and -carotene. These data should be useful to the people who inhabit the western Sahel in helping them devise healthy diets during times when cereal staples are in short supply.     

狗牙根诱变后代抗寒性评价

通过电解质外渗法和匍匐茎恢复试验对‘阳江’狗牙根及其12个通过形态鉴定选出的坪用价值高且花序密度低的诱变后代进行抗寒性鉴定。电解质外渗法结果表明:诱变后代间的抗寒性具有较大差异,其叶片半致死温度(LT₅₀)的变异范围为-7.6～-0.2℃(最低值与最大值相差7.4℃);参试材料抗寒性由强到弱依次为M18>M4>M26>M28> M22>阳江>M29>M31>M10>M37>M16>M1>M25,其中,有5个诱变后代抗寒性优于亲本,分别是M18、M4、M26、M28、M22。匍匐茎恢复实验结果表明:诱变后代M1、M22、M26、M31、M25在0℃和-5℃低温胁迫后的恢复生长率都高于亲本,恢复能力均优于亲本;M10、M37、M28在-5℃低温胁迫下,恢复生长能力低于亲本,抗寒性相对较弱,M16和M4在0℃和-5℃低温胁迫下,恢复生长率都低于亲本,抗寒性明显弱于亲本。综合2种方法鉴定结果显示:诱变后代M1、M25的恢复能力较强;M4、M28的叶片抗寒性较好,青绿期较长;M22、M18、M26的叶片抗寒性和匍匐茎恢复能力均较强;M29,M31的叶片抗寒性和匍匐茎恢复能力与亲本相似;M10、M16、M37的叶片抗寒性和匍匐茎恢复能力均较弱,整体抗寒性较弱。     

Comparisons of methods of scheduling irrigations of potatoes

Irrigation of Netted Gem potatoes was scheduled during three growing seasons by three methods: (a) when plants displayed first visual symptoms of moisture stress, (b) when indicated by a soil moisture budget involving estimated evapotranspiration, and (c) on the basis of tensiometer readings of soil moisture suction. When the tensiometer method of scheduling was used, the mean yields of tubers were 55.0 and 25.8 cwt/acre (6160 and 2890 kg/ha) higher than those obtained with the other two scheduling methods. Methods did not affect the specific gravity of potatoes. Method (a) scheduled irrigations least frequently. Scheduling by the budget method was not always adequate because it was based on the assumption that the crop extracted water from a constant 4 ft (1.2 m) profile from planting to full vegetative growth. In one year the budget method scheduled the first irrigation earlier than necessary and delayed the second irrigation during a critical period of crop growth. From full vegetative cover to harvest the irrigation schedules were alike for both the budget and tensiometer methods.     

湖南沅陵4种绿茶品质成分分析

以长沙县高桥相同嫩度茶鲜叶原料采用卷曲形毛尖茶加工工艺制绿茶为对照,分别对沅陵县齐眉翠峰、凤娇碣滩茶、干发茶和军大坪茶4种绿茶的主要生化成分与感官品质进行初步分析。结果表明,沅陵4种绿茶的茶多酚总量28.76%~30.34%,游离氨基酸总量2.35%~3.22%,咖啡碱含量3.00%~3.63%,水浸出物含量37.26%~40.07%,可溶性糖总量5.46%~5.65%,可溶性蛋白含量1.50%~1.74%,类黄酮化合物总量1.16%~1.79%,叶绿素总量1.36%~2.01%,儿茶素总量13.53%~16.20%。与对照相比,4种绿茶的茶多酚、可溶性糖和儿茶素总量均高于对照,除齐眉翠峰外其余3种茶样水浸出物和叶绿素总量均高于对照,除干发茶外其余3种茶样类黄酮化合物总量均高于对照。     

吉林省平安农业科学院大豆所大豆研究工作报告

1　吉林省平安农业科学院大豆研究工作简介吉林省平安农业科学院大豆研究所 ,设在吉林省长春市西安大路种子大厦内。现有科技人员 6人 ,其中研究员 2人 ,农艺师 2人 ,技术员 2人 ,定向培养研究生 2人。大豆研究所的主要任务是选育稳产、高产、优质及抗病虫大豆新品种 ;同时密切     

Comparison of two methods of PCNB application for control of Rhizoctonia infection of potatoes

A broadcast application of PCNB (Terraclor) resulted in a reasonably uniform distribution of the chemical in the soil with the concentration decreasing in a linear fashion with increasing depth in the soil profile. A banded application resuluted in a considerably higher chemical concentration at the 4–6 inch depth than at the 0–2 or the 2–4 inch depths. The problem of the lack of uniformity of chemical distribution could probably be solved by altering nozzle placement and size and allow use of the band method of application to minimize grower cost. More complete disking in the case of the broadcast treatment would probably result in a relatively uniform distribution of the chemical but at higher cost to the grower. PCNB application rates of 10, 15 and 25 lbs per acre broadcast and 71/2, 10 and 121/2 lbs per acre in a band significantly reduced the severity ofRhizoctonia infection of Russet Burbank potatoes but did not increase potato yields significantly.     

Prediction of the digestibility of the diet of horses: evaluation of faecal indices

Data from in vivo digestibility trial with four to six horses fed twenty-seven forage-based diets are used to calculate prediction equations for the digestibility of dry and organic matter, based on the crude ash (CA), crude protein (CP) and crude fibre (CF) contents of diets and faeces. The most precise prediction of dry-matter digestibility (r.s.d. = 0.032, R²= 0.80) was derived from a multiple regression including faecal (CP, CF) and dietary parameters (CF). Among faecal parameters, CP was the best single predictor of both digestibility (r.s.d) = 0.040, r²= 0.63) and dietary CP content (r.s.d = 0.028, r²= 0.59). For biological reasons we propose a non-linear model that allows prediction of dry- and organic-matter digestibility from faecal CP Content with reasonable Precision (r.s.d = 0.038, 0.036, r²= 0.65, 0.74, respectively). This will be adequate for many studies, especially for free-living animals in rangelands.     

橡胶树丛枝病病原的抗血清制备与应用

以感染橡胶树丛枝病病原的长春花为材料,制备得到橡胶丛枝病病原菌抽提液,以抽提液为抗原免疫家兔,制备抗血清,经微量沉淀测定,抗血清效价为１：２０４８。应用橡胶丛枝病抗血清检测橡胶褐皮病,无症苗木检出率达３０％－３７％,可疑的褐皮病树检出率达８５．７％。