鞭角华扁叶蜂防治研究

对鞭角华扁叶蜂进行5年防治试验,在幼虫危害盛期用1:3000～2000倍20％氰戊菊酯乳油、1:1000倍50％甲胺磷乳油喷雾防治,幼虫越冬期的当年11月～次年2月对受害林地进行深翻,成虫羽化高峰期用1:1500倍50％甲胺磷乳油和80％敌敌畏乳油混合液喷雾防治均能达防治目的。     

呼吸抑制剂和木瓜酶对蓖麻韧皮部溢泌过程的影响

用微量注射器分别将2,4-二硝基酚、叠氮化钾、叠氮化钠和木瓜酶溶液注射到韧皮部溢泌伤口,研究溢泌速率、蔗糖浓度和钾离子浓度的变化。试验结果显示,呼吸抑制剂和木瓜酶均导致溢泌速率显著下降。呼吸抑制剂和木瓜酶处理后韧皮部溢泌速率随溢泌过程分别为不可恢复和可部分恢复;韧皮部溢泌速率降低伴随汁液中钾离子浓度降低和蔗糖浓度增高。     

含铅的多元氢阴极电催化性能的研究

用电沉积法制备Ｍｏ－Ｗ－Ｎｉ－Ｐｂ－Ｃａ多元活性阴极，研究了在０．５ｍｏｌ／Ｌ Ｈ２ＳＯ４中的析氢反应，结果表明，多元阴极具有较高的电催化活性，其析氢过电位比软钢阴极降低３０５ｍＶ，ｉ０提高三个数量级，且有较好的稳定性，并用光电子能谱研究了表面组成和结构。证实表面有：Ｎｉ，ＮｉＯ，ＭｏＯ２，ＭｏＯ＾２－４，ＷＯ３，ＰｂＯ２，ＰｂＯ，Ｃａ＾＋＋等物质。     

对一起定点屠宰点宰杀病死猪案的查处及启示

1案由 2001年5月4日下午18时,我县金水兽医站检疫人员在槐树关食品站金水定点屠宰点执行检疫任务时,发现该场两头生猪患败血型猪丹毒而死亡,现场处理要求该点作销毁深埋处理,场地、圈舍进行无害化消毒.     

植物活体水分探测仪的研制及测试初报

利用NIM插件探测器及金硅面垒探头组装了植物活体水分探测仪;筛选并分析了仪器的最佳工作条件;检测了春小麦、玉米、苜蓿、豌豆、红豆草叶片鲜重的变化。结果表明;叶片水分随时间损失大的,其抗旱性差。叶片保水的秩序为:红豆草、豌豆>苜蓿>春小麦>玉米。     

WEPP模型中的CLIGEN与BPCDG应用对比研究

通过对遂宁组紫色土产流、产沙侵蚀的观测,运用迄今为止最为复杂的土壤侵蚀预测模型WEPP模型进行单次降雨侵蚀预测,与实测值比较,并对比通过气候生成器CLIGEN和断点生成器BPCDG的产生的气候参数对预测值的影响。通过分析比较结果,认为WEPP模型对遂宁组紫色土侵蚀过程预测合理,而且利用断点生成器BPCDG的预测结果要优于气候生成器CLIGEN的预测结果。     

Re-defining tillage erosion: quantifying intensity–direction relationships for complex terrain

Abstract. Current tillage erosion models account for the influence of tillage direction in the magnitude of the soil (tillage) transport coefficient. It is argued here that this is counter-intuitive and causes significant problems in modelling tillage erosion in areas of complex terrain. This article examines whether a re-modelling of tillage erosion is possible that separates tillage direction (an interaction with the landform) from the soil transport coefficient (a measure of tillage intensity representing the combination of implement erosivity and soil erodibility). Experimental data for mouldboard ploughing upslope, downslope and cross-slope at Coombe Barton Farm, Devon are examined. Integration of data for all directions into a single relationship, which relates translocation in the direction of tillage to slope in the direction of tillage and translocation perpendicular to tillage to slope perpendicular to tillage, is not possible using previously published methods of analysis. However, when total translocation distance is regressed against the tangent of the slope at 45° to the tillage direction (bisecting the tillage direction and the direction of overturning) it is found that a single relationship can be used to describe tillage in all three directions. Therefore, this relationship is used to determine a single value of the soil transport coefficient ( k _fTa) for constant soil and implement conditions but different tillage directions. This redefinition of tillage is important both for true estimation of tillage erosion severity, the adirectional coefficient being 40% larger than the directional coefficient, and for modelling of tillage erosion in complex terrain. These improvements are vital when tillage erosion simulation is used to direct soil conservation strategies.     

乐业县茶叶生产现状和发展前景

乐业县位于广西百色市西北部,云贵高原的边缘,属喀斯特地貌峰丛,东靠河池市的天峨县,南依百色市凌云县,西北与贵州省罗甸县隔河相望,西南与百色市田林县毗邻,是百色通往贵阳最为便捷的中转站.……     

黄淮夏大豆主要农艺性状的遗传分析

利用黄淮地区的12个高产夏大豆品种(系),通过NCⅡ交配设计,对12个主要农艺性状的遗传进行了分析。结果表明,所有性状的加性方差大于显性方差。主茎节数、株高、每簇荚数和主茎荚数的加性成分占绝对优势,遗传力较高。分枝荚数、单株粒数和单株粒重的显性成分比例大,遗传力较低,其中单株粒重趋于完全显性。主茎节数的显性成分很少,其它性状均为部分显性。建立了单株产量与产量因子之间的逐步回归方程。