关于提高应用型本科植保专业学生实践技能探究

通过对吉林农业科技学院近3年不同届次植物保护专业应届毕业生的实际跟踪调研,结果发现目前植物保护专业毕业生正面临着能力弱化现象.这些现象集中体现在实践技能、知识理论能力、个人综合工作能力等,其中实践技能和综合能力在社会实际工作与生产中演化出的矛盾尤为突出.本文就当下植物保护专业毕业生所出现的几点问题进行探讨,并对有关应用型本科植物保护专业学生的实践技能和个人能力的培养提出几点建议.     

“秸秆生物反应堆”技术在日光温室樱桃西红柿生产中的应用研究

为提高日光温室樱桃西红柿产量和品质,促进秸秆循环利用,从2010年开始,作者在平度市明村镇大黄埠村利用＂秸秆生物反应堆＂技术将玉米秸秆发酵,为日光温室樱桃西红柿生产提供所需的热量、CO2、酶、抗病孢子、无机及有机养料,成功实现樱桃西红柿的优质、高效和有机生产,实现环境安全环保。应用研究表明：这种栽培技术成本低、易操作、资源丰富、果实表面光洁鲜亮、产量增加、环保效应显著,达到有机安全无公害和农民增收的生产目标。     

Nitrogen for no‐tillage corn in Virginia: Sources and time of application

Abstract

No‐tillage corn (Zea mays L.) culture normally entails the placement of N fertilizer on the soil surface without mechanical incorporation. This field investigation was conducted to compare the N fertilizers that are most widely used in Virginia, when applied in this manner, for their effectiveness in producing notillage corn. Comparisons of the time of applying NH₄NO₃ were also made. Grain and stover yields, in addition to N removed in the crop, were used to draw conclusions. The experiments were conducted on both fertile and infertile soils in 1972 and 1973, both of which were relatively wet years. The fertilizers tested, urea, NH₄NO₃, and N solutions, were equally effective, per unit of N applied. Split applications of NH₄NO₃ showed no statistically significant advantage over all applied at planting but slightly trended to do so. N deficiency reduced grain yields relatively more than stover yields.     

The relationship between phosphorus and copper concentrations in wheat

Abstract

Poorly managed kaolinitic soils are often too low in P and K for optimum agronomic crop production. Even though many of these soils have relatively high phosphate fixing capacities, P applied at sufficient rates to increase soil P to acceptable levels may induce micronutrient deficiencies. The purpose of this study was to evaluate the effects of applied and residual P on Mn, Zn, and Cu uptake by field grown wheat (Triticum aestivum). Treatments were a one‐time application of P (0, 64, 128, 256, and 384 kg/ha P) and K (0, 110, 220, 440, and 660 kg/ha K) rates arranged in a 5×5 complete factorial. The treatments were applied in October, 1977 and the study was continued through June, 1979. Potassium and P × K interactions did not have a significant effect on Mn, Zn, or Cu uptake. Phosphorus did not affect Mn concentration in the wheat tissue but Zn and Cu concentrations generally decreased as applied and residual soil P levels increased. The tissue Zn concentration at the various plant growth stages did not decrease below defined critical levels. The Cu concentration decreased linearly with applied P and curvilinearly with residual P. The tissue Cu levels often decreased below suggested critical levels. Total Cu in the wheat tissue indicated that the decrease in Cu concentration as P levels increased was not a simple dilution effect resulting from increased plant growth as applied and residual soil P increased.     

Petiole and leaf nitrate studies in sunflower

Abstract

This study was conducted at two sites in Mississippi to determine whether petiole and leaf NO^‐ ₃ monitoring could be used as a management tool in making fertilizer N recommendations for sunflower (Hellanthus annuus L.). Petiole and leaf samples were taken at the four leaf stage at both sites, and later at two week intervals at Brooksville. Petiole and leaf NO^‐ ₃ at the four leaf stage was significantly influenced by rate of N application at both sites. The level of petiole and leaf NO^‐ ₃ was highly correlated with rate of N application as well as with seed yield. The concentration of NO^‐ ₃ in petioles and leaves was greatest at the four leaf stage and showed quadratic declines as the season progressed. Petiole and leaf NO^‐ ₃ showed the highest correlations with rate of N application and seed yield at the four leaf stage than at any other sampling time at Brooksville, indicating that this was the “best” period for taking petiole and leaf samples. However, analysis of petioles and leaves at the four leaf growth stage for NO^‐ ₃ may have limited potential of becoming a useful tool in making N fertilizer recommendations for sunflower. This is due to the sensitivity of both petiole and leaf NO^‐ ₃ to time of sampling and locational differences, as well as lack of information on response of sunflower to N applied after this stage of growth.     

模拟教学方法在应用写作课中的运用

应用文是人们在日常工作、学习和生活中，处理现代戏事和私事的文书，具有时效性、实用性、真实性、专业性等，根据应用文这些特点，结合教学实践，论述了模拟教学在应用写作课中的运用。     

氨化木质素在丸粒化种衣剂中应用研究初报

以造纸工业废料——氨化木质素作为丸粒化种子包衣剂的辅料包衣花椰菜和豇豆种子,研究其应用效果,探索再生资源重复利用的新途径。结果表明,氨化木质素Ls-1能促进蔬菜幼苗生长发育和增产,可以在种子丸粒化包衣剂生产中充分利用。     

大学图书馆开展阅读疗法的必要性和可行性

通过分析当今大学生的心理健康状况,揭示在高校图书馆开展阅读疗法的优势及意义,阐述了高校图书馆开展阅读疗法的方式和方法,说明了大学图书馆开展阅读疗法的必要性和可行性这一主题。     

南疆棉花生物量积累对氮肥的响应

在南疆生态条件下对不同氮素水平(337.5、450、562.5、675和787.5kg/hm2尿素)处理下的棉花生物量积累进行了大田试验,结果表明棉花干物重积累符合Logistic曲线模型,棉花生物量增长对氮肥反应敏感,不同的施肥量造成棉花生物量积累快速生长期的起始、终止日不同,使快速生长期内生物量积累的平均速率、最大速率等参数发生改变,从而影响营养生长和生殖生长进程,这是产量形成差异的主要原因;施入尿素562.5kg/hm2时,棉花最先进入快速生长期,快速生长期内生物量积累的平均速率、最大速率高于其它处理,特征参数协调,产量最高。     

绵阳师范学院图书馆迎评促建举措

谈了绵阳师范学院图书馆如何抓住本科教学工作水平评估这一契机,为"管理手段先进,图书馆使用效果好"这一指标所采取的一些举措.