鲁西黄河故道杨树林间作效益的研究

经过6年对鲁西黄河故道杨树人工林进行施肥量、间作物、密度等因素的正交试验，证明只有扩大造林行距为10m左右，造林后立即实行林下间作，并尽量延长间作年限，才能保证树体营养供应和林木正常生长，提高林地的生产力和经济效益。同时，探索出在此类土地上不同林龄的杨树人工林的最佳间作方式。     

Correlation between myocardial interstitial collagen remodeling and changes in hemodynamics in rats with myocardial infarction

AIM: To study the relationship between cardiac extracellular matrix remodeling and cardiac function after myocardial infarction. METHODS: We observed sequential changes in collagen contents and collagen Ⅰ/Ⅲ ratios in infarct zone (IZ) and non-infarct zone (NIZ) and their relationship to the parameters of left ventricular systolic and diastolic function in the rat model of myocardial infarction induced by ligation of left main coronary artery. RESULTS: Collagen conteants in IZ and NIZ after 3d of myocardial infarction were significantly higher than those in sham group at corresponding time (P<0.05, P<0.01). Collagen Ⅰ/Ⅲ ratio in IZ decreased on day 3, significantly increased after 7 d (P<0.01). Collagen Ⅰ/Ⅲ ratio in NIZ increased significantly afte14 d. Correlated analysis between collagen contents in IZ or NIZ and collagen type Ⅰ/Ⅲ ratio and maximal ascending velocity (+p'_max) or maximal descending velocity of the left ventricular pressure (-p'_max) was performed and the negative correlation between collagen contents in NIZ and +P'_max (r=-0.589, P>0.05) and -P'_max (r=-0.788, P<0.01) was found. Collagen content in IZ positively correlated to the +P'_max (r=0.70, P<0.50), but not to -P'_max (r=-0.29, P>0.05). Collagen type Ⅰ/Ⅲ ratios in NIZ correlated negatively to the +P'_max (r=-0.504, P>0.05) and -P'_max (r=-0.545, P>0.05), but there were no relationship between collagen type Ⅰ/Ⅲ ratios in IZ and +P'_max or -P'_max in IZ. CONCLUSION: Collagen deposition in IZ after myocardial infarction was of benefit to improvement of systolic function. Collagen deposition in NIZ was harmful to systolic and diastolic function.     

1日龄火鸡新城疫LaSota苗与灭活苗联合接种后的免疫应答

火鸡１日龄时用新城疫ＬａＳｏｔａ苗与油乳剂灭活苗联合免疫后，在７、１４、２１、３５日龄及攻毒后，检测了火鸡免疫器官组织法氏囊、胸腺、脾脏、盲肠扁桃体、哈德尔腺中浆细胞、ＴＡＮＡＥ＋＿数量变化。结果表明：免疫火鸡法氏囊、脾脏、盲肠扁桃体、哈德尔腺的浆细胞明显增多，机体体液免疫应答显著增强；胸腺、脾脏、盲肠扁桃体、哈德尔腺中ＴＡＮＡＥ＋也程度不同地增多，细胞免疫应答也明显增强，免疫后６０ｄ，用新城疫苗强毒攻击，免疫火鸡获得了良好的保护。     

贵州古茶园调查及其茶树的理化成分分析

为更好地保护和利用贵州古茶树资源,采用查阅文献记载后结合实地调查方法,对黔南州、黔东南州和铜仁地区古茶园的分布、生境及茶树种质生长势、形态特征、抗逆性和利用现状等进行调查,对古茶园茶树的内含成分进行理化分析。结果表明:在调查的18个古茶园中,海拔,贵定县岩下乡铁索岩村茶山组最高,达1 574m,从江县西山镇滚郎村最低,仅268m,其中,<500m的古茶园1个,占5.6%;500～1 000m的古茶园7个,占38.9%;>1 000m的古茶园10个,占总数的55.6%。类型,野生型古茶园12个,占66.7%;栽培型古茶园6个,占35.7%。生态环境,植被较丰富,大部分野生型古茶园周围均有古树。茶树叶片理化成分,17个样品水浸出物、咖啡碱、氨基酸和茶多酚含量平均分别为47.7%、3.87%、2.6%和36.7%,儿茶素组分为EC相似文献   

老参地土壤提取液对水稻种子萌发及幼苗生长的化感效应

【目的】探讨不同质量浓度老参地土壤提取液对水稻种子萌发、幼苗生长及光合作用的影响,为人参水稻轮作体系研究提供参考。【方法】采用室内生物测定法及基质盆栽试验,以去离子水为对照（CK）,研究低（10 g/mL）、中（20 g/mL）和高（40 g/mL）3种质量浓度的老参地土壤水提液,对水稻种子萌发、幼苗生物量、根系活力、叶片可溶性蛋白和叶绿素合成、电导率及净光合速率的影响。【结果】与对照相比,不同质量浓度老参地土壤提取液处理后水稻种子萌发率、苗高及幼苗生物量均有不同程度的增加,其中随着老参地土壤提取液处理质量浓度的升高,水稻种子萌发率逐渐增加,中、高质量浓度处理与CK差异显著（P<0.05）。当老参地土壤提取液质量浓度为40 g/mL时,单株鲜、干质量最大,分别为14.22和1.66 mg。各质量浓度老参地土壤提取液处理对苗高影响不显著,却明显抑制了水稻幼根的生长。中、高质量浓度老参地土壤提取液处理均显著促进了幼苗叶片可溶性蛋白合成,低质量浓度老参地土壤提取液处理明显促进了根系活力的增加,而高质量浓度老参地土壤提取液处理则降低了根系活力;不同质量浓度老参地土壤提取液处理均显著降低了水稻叶片的叶绿素含量和绝对电导率;低、中质量浓度老参地土壤提取液处理下叶片净光合速率均有增加,而高质量浓度老参地土壤提取液处理则表现出微弱的抑制作用。【结论】老参地土壤水提取液对水稻早期萌发生长有一定的促进作用,且对部分生理指标（根系活力和净光合速率）表现为“低促高抑”的剂量相关性反应。     

景洪市基诺族人居环境研究

通过对基诺族人居环境构成中的自然系统、社会系统、居住系统、支撑系统等方面进行分析,对研究区域进行长期的实地踏勘、资料收集、拍照实测和走访记录,总结出基诺族人居环境特色,其目的是将所得结论运用到现代人居环境建设中,有效地继承和利用基诺族人居环境特色,从而为探究现代人居环境的建设提供新思路和方法。     

“以人为本”理念下的高校新生入学教育

分析了"以人为本"理念与新生入学教育的关系,提出了"以人为本"为高校新生入学教育提供指导作用,是适应时代发展和提高时效性的需要,就如何完善"以人为本"理念下的高校新生入学教育展开探讨,提出要强化"以人为本"的新生入学教育理念和构建"以人为本"的入学教育新体系。     

Left abomasal displacement between the uterus and rumen during bovine twin pregnancy

Here, we describe two cases of left displaced abomasum (LDA) in Holstein cattle at 6 and 9 months of twin gestation. Clinical examination revealed signs of proximal ileus with marked abdominal distension, but no ping sounds. An unusually high position of the gravid uterine horn on the left side was observed with ultrasound. Left exploratory laparotomy confirmed that the abomasum was displaced to the left and entrapped between the rumen and twin gravid uterine horn. A left surgical approach was necessary to correct the condition. Both animals recovered and gave birth to healthy twins. The present cases indicate that the subomental position of a heavy twin gravid uterine horn is a possible mechanical cause of LDA.     

临时柱板式锚定板挡土墙在旧路改造工程中的应用

结合国道301旧路改造工程中临时柱板式锚定板挡土墙的设计和施工应用,着重讨论了临时柱板式锚定板挡土墙的墙后土压力、板后土压力、锚定板抗拔能力和结构稳定性分析,介绍了构件设计和施工工艺。实践证明这是一种经济适用的填方支护方法。     

留守儿童希望感、心理韧性特点及关系

留守儿童的心理品质正在吸引研究者的关注。本研究发现,留守男童的希望感、心理韧性显著高于留守女童;母亲外出的留守儿童比父亲外出的留守儿童希望感高,父母都外出的留守儿童心理韧性显著高于父亲外出的留守儿童;学习成绩优异的留守儿童希望感、心理韧性显著高于成绩差的留守儿童;留守儿童的希望感、心理韧性总体随年级增高而降低;父亲或爷爷照看的留守儿童希望感、心理韧性显著高于母亲、奶奶、外公外婆照看、社会托管的留守儿童;留守儿童希望感与心理韧性呈显著正相关。