海明威作品《太阳照旧升起》之会话分析

本将依合作原则对海明威作品《太阳照旧升起》进行会话分析,以揭示作品中男、女主人公的性格特征。     

区域土地利用变化环境效应研究综述

以黄土高原为重点 ,对植被变化及其引起的土地利用变化的环境影响的有关研究进行了比较系统的阐述。对植被研究态势 ,土地利用变化对水文生态过程、土壤环境及生物多样性影响做了简要的述评 ,对该领域的目前存在的问题进行了分析 ,并提出了有关进一步研究的建议     

浙江省园林芳香植物的开发利用现状及其前景

随着城市园林建设进程的日益加快,可供园林绿地应用的植物种类的匮乏,极大地限制了景观设计师的思维,对城市园林绿化水平的提高产生了阻碍。园林芳香植物作为一种新型的植物类群,应用前景广阔。本文从介绍园林芳香植物出发,阐述了浙江省园林芳香植物的开发利用现状,特别是杭州植物园引种园林芳香植物的情况,最后对园林芳香植物的应用前景进行了探讨。西北林学院学报23卷第4期江燕等浙江省园林芳香植物的开发利用现状及其前景     

川水地玉米氮磷钾肥效应研究

采用3414设计在关中西部潮土、土区进行田间试验,通过主因素、单因素效应分析,定量评价氮、磷、钾肥用量与玉米产量的关系,提出玉米的养分丰缺指标和最佳施肥量。结果表明,氮肥使玉米增产15.6%～62.2%,磷肥增产11.2%～26.7%,钾肥增产2.3%～34.3%。氮、磷、钾肥对不同类区玉米产量的影响不同。根据施肥模式和资源价格确定的N、P2O5、K2O推荐施肥量,高肥力分别为129.8～167.8、50.6～71.8、29.4～60 kg/hm2;中肥力分别为163.6～186.2、74.2～94.9、59～97.7 kg/hm2;低肥力分别为182.8～203.4、94.3～118、92～106.9 kg/hm2;极低肥力分别为200～225.4、105.9～135.5、107.1～137.5 kg/hm2。     

Temporal development and relationship amongst brown rot blossom blight,fruit blight and fruit rot in integrated and organic sour cherry orchards

The aim of this 4‐year study was to characterize temporal development of brown rot blossom blight and fruit blight (caused by Monilinia spp.) and their sporulating areas in sour cherry orchards; and to determine the relationships amongst incidence and sporulating area of blossom blight, fruit blight and fruit rot. The study was performed in integrated and organic orchard blocks on two cultivars (Újfehértói fürtös and Érdi b?term?). On both cultivars, disease progress on flowers and fruits was 2–10 times slower in the integrated than in the organic management system. The peak incidence values were 9 and 31 days after petal fall for blossom blight and fruit blight, respectively. After these dates, no new blight symptoms on flowers and/or fruits appeared and the disease was levelling off. Final blossom blight incidence ranged from 1 to 5% and from 12 to 34%, and fruit rot incidence from 2 to 6% and from 11 to 26% in the integrated and the organic orchards, respectively. The sum of fruit blight incidence ranged from 9 to 22% for the organic system, but was below 5% for the integrated system, while the final sporulating area was 5–16 mm² and <3 mm², respectively. Among the five highest Pearson's correlation coefficients, relationships between blossom blight and early fruit blight stage (r = 0·845, P = 0·0087 integrated; r = 0·901, P = 0·0015 organic), and between sporulating area and fruit rot (r = 0791, P = 0·0199 integrated; r = 0·874, P = 0·0039 organic) were the most significant relationships from an epidemic standpoint as they indicated a connection between different brown rot symptom types.     

陕西省杨陵区鸡球虫病原种类的调查研究

对杨陵区四乡一镇的６８组鸡群进行了鸡球虫病的调查研究。结果表明，杨陵区鸡球虫病比较普遍，１５￣５０日龄雏鸡的球虫病特别严重。全区鸡的球虫平均感染率为５８．３％，在所检查的青年，成年鸡群中，笼养鸡群的球虫感染率为３５．１％，散养鸡群的球虫感染率为５７．４％。雏鸡的球虫感染率为６８．４％。经实验室鉴定，共查见柔嫩艾美耳球虫，毒害艾美耳球虫，巨型艾美耳球虫，堆型艾美耳球虫和缓艾美耳球虫和哈氏艾美耳球虫等     

新疆塔城地区草地害鼠及其防治对策

根据塔城地区草地优势种害鼠发生危害区域划分 ,论述了该地区优势种害鼠分布及危害 ,提出了防治对策     

中国水蚀土壤抗剪强度研究

利用野外测试数据、土壤样品的室内理化分析数据和参考文献数据 ,对水蚀区范围内水土流失过程中的土壤抗剪强度进行了初步研究 ,建立了中国水土流失土壤抗剪强度的回归模型 ,总结出水蚀区范围内水蚀过程中有关土壤抗剪强度的 3条结论 :影响水土流失过程中土壤抗剪强度的主导因素是容重、粉 /黏、土壤含水量、土壤有机质含量 ;抗剪强度随土壤类型发生有规律的变化 ;抗剪强度在中国水蚀区范围内有较明显的空间分异规律 (包括水平分异规律和垂直剖面构型规律 )     

GIS支持下小流域农林复合经营的侵蚀控制模拟——以冀西北青边口河小流域为例

根据张家口郭家梁试验场的小区资料 ,建立了小流域侵蚀产沙模型以及植物篱侵蚀控制模型 ;并在 GIS的支持下 ,从小流域数字高程模型 (DEM)中提取基于地块间水沙汇流网络 ,生成基于地块的水沙运移网络图 ,并将地块间的水沙汇流过程引入小流域侵蚀产沙的模拟中 ,实现了侵蚀产沙模型与地理信息系统 (GIS)的深层次耦合 ,模拟出坡面水沙在小流域的空间运动过程。1995～ 1999年青边口河小流域模拟结果表明 ,坡耕地、荒坡地、低覆盖的天然草地平均侵蚀模数最大 ,是侵蚀控制的重点土地利用类型。在坡耕地、荒坡地、低覆盖的天然草地配置面积占流域总面积的 18.2 %的植物篱—农作系统 (10 m带间距 2年生紫穗槐植物篱 ) ,利用次降雨资料计算模拟结果表明 ,对径流的控制效果在 8.1%～ 46 .2 %之间 ,对侵蚀模数的控制效果在 42 .9%～ 5 0 .2 %之间 ;养分流失的模拟分析表明 ,在现有条件下有机质的损失较大 ,而通过配置植物篱—农作系统可以有效地减少养分流失。     

Postmortem proteome changes of porcine muscle related to tenderness

Proteome analysis was used to investigate the relation between changes in postmortem proteome of porcine muscle and tenderness development. Muscle samples were taken at slaughter and 72 h postmortem, and the registered changes in the proteome were related to Warner-Bratzler shear force. One hundred and three protein spots were found to change significantly (P < 0.01) over time, and of these the 27 most pronounced changes were identified. Eleven out of the 27 changes were fragments of actin. Other identified myofibril proteins or fragments included myosin heavy chain, titin, myosin light chain I, myosin light II, CapZ, and cofilin. Correlation analysis revealed significant correlations between three of the identified actin fragments and the myosin heavy chain fragment to shear force. Moreover, myosin light chain II and triose phosphate isomerase I were also found to correlate significantly to shear force. The results clearly demonstrate that postmortem degradation of actin and myosin heavy chain is related to meat tenderness.