双吉尔与其它植物生长调节剂在夏玉米上的应用对比试验

3年(2002～2004年)试验结果表明:双吉尔6号处理比对照(清水处理)增产12.59%(极显著),比ABT4号、喷施宝和绿风95处理显著或极显著增产;双吉尔8号处理比对照增产10.99%(极显著),比喷施宝处理和绿风95处理增产极显著,比ABT4号处理增产不显著;ABT6号处理的产量高于双吉尔8号处理。增产原因在于促进了根系生长发育,植株生长加快,果穗变大,千粒重提高。     

三种PPC降解地膜与普通地膜在花生上的应用效果对比

大田条件下,采用普通白膜、黑色地膜和PPC1、PPC2、PPC3号降解膜等五种不同类型地膜覆盖栽培,以露地不覆膜为对照,研究不同类型地膜覆盖栽培对花生产量品质的影响。结果表明,PPC3号降解膜具有极好的降解效果,但增产效果较差,不能很好地发挥地膜覆盖栽培应有的增产增收优势;PPC1号膜具有较好的降解效果,较露地栽培增产13.43%,达极显著水平,但较普通黑、白地膜及PPC2号膜覆盖栽培减产均达极显著水平;PPC2号膜具有较长的覆盖时间,较露地增产26.09%,达极显著水平,但较普通黑、白地膜减产分别达显著和极显著水平。     

红麻新品种闽红31的选育与推广

闽红31系以红麻青皮3号为母本与722为父本杂交选育而成.1989～1998年与青皮3号复壮种对比41点次,平均亩产原麻427.5kg,比青皮3号增产16.68%,达极显著.与粤74/3原种对比51点次,平均亩产原麻423.8kg,比粤74/3增产13.62%,亦达极显著.该品种群体整齐、植株高大、茎粗、有效株数多,抗炭疽病力强,丰产稳产性好、适应性广.至2000年省内外累计示范推广0.7万hm2.     

红麻新品种闽红31的选育与推广

闽红31系以红麻青皮3号为母本与722为父本杂交选育而成。1989～1998年与青皮3号复壮种对比41点次，平均亩产原麻427.5kg，比青皮3号增产16.68%，达极显著。与粤74/3原种对比51点次，平均亩产原麻423.8kg，比粤74/3增产13.62%，亦达极显著。该品种群体整齐、植株高大、茎粗、有效株数多，抗炭疽病力强，丰产稳产性好、适应性广。至2000年省内外累计示范推广0.7万hm^2。     

2006年广东省甘蔗新品种区域品种比较试验结果初报

区域品种比试验结果表明,粤糖99—66蔗产量、含糖量均居参试品种之首,比新台糖10号、新台糖16号增产增糖极显著,增产增糖幅度大,农艺性状较好;粤糖00—236蔗产量、含糖量均排第2位,比新台糖10号、新台糖16号增产显著,增糖极显著,增产增糖幅度大,特早熟,糖分高,农艺性状优良,是一个质与量结合较好的甘蔗新品种;粤糖00—318和粤糖01—79蔗产量、含糖量比新台糖10号、新台糖16号均有不同程度的增产增糖,但增产增糖效果不明显,甘蔗蔗糖分均比新台糖10号、新台糖16号高,农艺性状较优良,分别排第3位和第4位。     

甘肃高寒阴湿地区地膜覆盖对马铃薯产量的影响

对甘肃省渭源县主栽的5个马铃薯品种采用地膜覆盖和露地两种栽培措施进行试验,结果表明,地膜与露地产量差异达极显著水平,地膜比露地增产11%～51%。品种间差异达显著水平。在所有品种中以脱毒陇薯3号、陇薯4号产量最高,比对照增产41%～68%,且综合性状良好。     

福建省2003-2004年红麻新品种(系)区试试验总结

2003-2004年福建省红麻新品种联合区试试验,由福建农林大学和福建省农科院提供的参试红麻新品种8个,以粤743和红引135为对照,在福建省5县市设点鉴定,对参试各品种的原麻产量进行方差和差异显著性分析,采用Finlay的品种稳定性分析方法对各参试品种进行丰产稳产性估算,结果表明供试中福红992产量居区试首位,平均每公顷原麻产量达7778kg,比对照粤743增产25.7%;其次为福红15号、福红14号、福红11号、福红13号平均每公顷原麻产量分别为7295kg、7283kg、7241kg和7189kg,分别比对照粤743增产17.9%、17.7%、17.0%、和16.2%,增产均达极显著水平;而金光2号和闽红964也比对照粤743增产9.6%和8.3%,也达极显著水平.各参试品种的主要农艺性状、品种稳定性、抗病性和品质也优于对照.     

Ⅱ优航2号的特征特性及作烟后稻高产栽培技术

Ⅱ优航2号(Ⅱ-32A×航2号),属中籼三系杂交稻组合,具有丰产、稳产性好、适应性广等优点。现将Ⅱ优航2号的特征特性及作烟后稻高产栽培技术总结如下:1产量表现Ⅱ优航2号2004年参加福建省中稻组区试,平均产量602·33 kg/667m2,比对照汕优63增产10·27%,达极显著水平。2005年续试,平均产量570·54 kg/667m2,比对照汕优63增产8·27%,达极显著水平。2005年生产试验,平均产量629·98 kg/667m2,比对照汕优63增产17·69%。2006年在尤溪县西城镇音头村连片种植7 hm2,经专家验收,平均干谷产量763·6 kg/667m2,比对照汕优63增产13·02%。2主要特征特性…     

超高产型杂交红麻中杂红318的选育

中杂红318(原名"H318")系利用外观性状叶型相似、父本L3-21茎色红色,母本P91茎色绿色,经济性状互补性强的红麻良种为亲本,从数十个组合中筛选出的超高产型抗病优质杂交组合,在入选的杂交红麻杂优组合比较中,杂优组合的优势是显著的.其中超高产型杂优组合H318(F1)在比较试验中,分别比KB2(中红麻10号)和红引135增产30.2%和64.2%,迭极显著水平;平均干茎1471.03kg/666.7m2,比对照中红庥10号增产20.54%;H318在2004-2006年全国红麻区域试验中,平均纤维产量每公顷4411.65kg,比对照中红麻10号增产20.75%,达极显著水平,较其它参试新品种增产显著.在全国红麻生产试验中平均纤维产量306.16 kg/666.7m2,比对照中红麻10号增产19.12%,差异迭极显著水平;纤维品质经农业部麻类产品质量监督检验测试中心检测.纤维支数266支,强力327牛顿,优于对照品种;该组合经人工接种炭疽病菌鉴定,烂头率为2.4%、病情指数为17.8,其指标优于对照,表现出植株高大,皮较厚,有效株数多,干茎产量和出麻率均高.纤维品质好,抗病性强,属于高抗类型.表明中杂红H318是高产、优质、多抗、适应性广的纺织、造纸兼用的红麻新组合.     

大豆新品种周豆20号选育及栽培技术

周豆20号是周口市农科院以高产、抗病、抗炸荚为育种目标,采用聚合阶梯杂交技术,经五次南繁加代和多年连续选择育成的大豆新品种。该品种综合性状优良,抗性好,且高产稳产,河南省区域试验平均产量186.5公斤/亩,比对照品种豫豆22增产6.06%,增产达极显著。河南省生产试验平均产量194.4公斤/亩,比对照豫豆22增产5.9%。2013年通过河南省品种审定委员会审定,适于河南省各地种植。     

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.     

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。     

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。     

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     

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.     

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％。