学会宽容

宽容是一种美德，是人性的光辉，也是做人必备的道德品质。宽容是一种爱，有了爱，才会有谅解，多一份谅解，才会使人与人之间的关系更为融恰。     

白化对菠萝蜜叶片生长及光合、呼吸特性的影响

为了研究白化对菠萝蜜叶片生长及光合、呼吸特性的影响,以白化菠萝蜜幼苗(AAS)和正常幼苗(CK)为材料,通过石蜡切片、LI-6400光合仪测定等方法,观察并测量了AAS和CK叶片的长度、宽度、面积、叶绿素质量分数、呼吸速率、净光合速率、胞间CO₂浓度、气孔导度及蒸腾速率等指标,比较两者的差异.结果表明：AAS叶片长度、宽度和面积及其日增长量均显著小于CK;AAS叶片长度、宽度和面积在1～17 d为正增长,18 d后因叶片萎缩死亡而呈现负增长;AAS叶片下表皮、栅栏组织、海绵组织及整片叶的厚度均较小;AAS叶片呼吸速率和胞间CO₂浓度均显著大于CK,净光合速率、气孔导度和蒸腾速率均较小,且当光合有效辐射强度在0～1 600μmol·m^-2·s^-1的范围内这些指标的数值几乎不变.     

炭基肥配施有机肥对风沙土养分含量及酶活性的影响

本文通过3年连续田间试验,研究炭基肥配施有机肥条件下风沙土土壤养分含量及酶活性的变化规律,探讨适宜炭基肥用量及有机替代的最佳配比,为减少化肥投入提供理论依据。试验共设置6个处理:低量炭基肥(C40)、基准用量炭基肥(C50)、高量炭基肥(C60)、有机肥替代20%基准用量炭基肥,以下简称为20%有机替代(C40+M)、40%有机替代(C30+M)和60%有机替代(C20+M)。结果表明,增施炭基肥和炭基肥配施不同比例有机肥均能显著增加花生产量,其中C20+M处理产量最高,为4324.83kg/hm~2。土壤速效养分含量、土壤酶活性在不同处理间存在差异,但在单施炭基肥时,表现为随施用量增加而增加。等养分条件下,配施有机肥处理能够提高土壤中有机碳、碱解氮和有效磷的含量,其中40%有机替代处理效果最佳;配施有机肥处理也可提高苗期土壤脲酶活性并延缓土壤蔗糖酶活性峰值出现的时间。综上所述,有效增加土壤有机碳含量、提高酶活性和增加花生产量的最佳有机肥替代炭基肥比例为40%。     

辽东地区油松落针病发生规律的研究

采用野外定点观察、抽样调查和室内实验测定等方法,对辽东地区油松落针病害的发生规律进行了研究,结果显示:油松落针病各个发生阶段症状特点明显,每年5～7月针叶枯黄脱落,8～10月针叶上出现明显的无性和有性子实体,该病原菌的侵染循环周期为1年;油松落针病的发生与坡向关系不明显,与坡位有明显关系,坡下腹发病较重;人工纯林病害的发生程度最重,人工混交林和天然混交林的发病程度较轻;林分密度越大发病越重,郁闭度越大发生越重;土壤中有机质、速效氮、速效磷含量随着病情加重而减少,其中速效氮表现最明显;全氮、全磷、速效钾的含量与病害发生关系不紧密.     

黄芪多糖在家禽养殖业中的应用

黄芪多糖是中药黄芪的有效成分之一,具有促生长、促免疫、抗病毒、抗肿瘤、抗应激等广泛的生物学作用,在家禽养殖业中具有良好的应用趋势。该文综述了黄芪多糖作为免疫增强剂、抗病毒药物和增强细菌类疫苗保护力的作用在家禽养殖中的应用。     

基于课程思政的"电气电子技术"教学设计与实践

"电气电子技术"课程是供用电技术专业进行岗位能力培养的一门工学结合的专业基础课程,在培养学生电气电子技术应用知识与技能的同时,也要将思政教育贯穿教学全过程.笔者以"电气电子技术"课程为例,详细介绍了思政理念下的教学设计和教学案例开放,将专业与育人相融合,潜移默化中培养学生的工程思维能力和工匠精神等职业素养.     

我国上市公司资本结构相关问题探析

资本结构是现代企业财务管理的核心，既影响企业的融资成本和市场价值，又影响企业的治理结构。本文分析了我国上市公司资本结构的现状及成因，并提出了优化建议。     

小麦苗期抗纹枯病鉴定方法的改良及抗病品种筛选

Wheat sharp eyespot, caused by Rhizoctonia cerealis and R. solani, is a soil-borne fungal disease, which poses a great threat to wheat yield. In order to increase the identification efficiency of wheat sharp eyespot resistance, an improved method of rapidly identifying wheat sharp eyespot resistance was established by inoculating wheat seedlings with diseased wheat grains in greenhouse. To verify its reliability, four standard materials and 96 wheat varieties from Huanghuai wheat region were used for resistance assessment to sharp eyespot. Meanwhile, the resistance to Rhizoctonia solani of aforementioned materials in the field was identified by traditional methods. The results showed that the correlation coefficient between the four repetitions of the improved method ranged from 0.735 to 0.825, and the correlation coefficient between the average number of repetitions and the traditional method was 0.630. The results of wheat sharp eyespot resistance identification in Huanghuai wheat area showed that 66 wheat varieties were susceptible, accounting for 68.8% of tested materials. This indicated that the resistance of wheat varieties in Huanghuai wheat area to sharp eyespot was poor on the whole and needed to be improved urgently. At the same time, eleven wheat varieties which showed resistance to sharp eyespot at seedling and adult stages were screened, which include Zhengzhou 8998, Beijing 841, Handan 94-5316, Jimai 32, Jinmai 50, Jinmai 54, Longmai 157, Lumai 23, Shanhe 6, Shi 02-1 and Xinmai 18. Therefore, this study provides a method for identification of wheat sharp eyespot resistance at seedling stage, by which the resistance of wheat varieties to sharp eyespot can be quickly and efficiently identified. Furthermore, selected resistant materials provide important material resources for wheat sharp eyespot resistance breeding in Huanghuai wheat region and even in China.     

我能拉他家的猪羊抵债吗

问：两年前．市场上柴油十分紧张，邻村农民张某说他能买到．于是我就将3000元现金交给了张某让他代买．可是张某不但没有买到柴油．至今连钱都赖着不还，我先后多次去他家里催要，他都不予理睬。有人对我说，不还钱就上门去拉他家的猪羊．卖他家的粮食来抵债。请问，我这样做行吗？[第一段]