马铃薯枯萎病和干腐病药剂防治筛选试验报告     

何国勤  刘东川  马慧 《现代农业科技》2021,17(17)

马铃薯产业是宁夏“1+4”特色优势产业,是西吉县所有农作物中种植面积最大、涉及农户最多、比较效益最高的农民脱贫致富的主导产业。近年来西吉县马铃薯产业由商品薯种植大县向种薯繁育大县的转变,推动了农业增效,农民增收的快速发展。但各类土传性病害的发生影响了马铃薯产业的发展,同时磋商了农民种植的积极性。为了测定筛选出对马铃薯枯萎病和干腐病防治效果好、成本较低药剂,为大田防治提供科学依据。  相似文献   

5种生物制剂对马铃薯种薯萌芽、极端天气下植株生长和产量性状的影响   总被引：1，自引：1，他引：0  

淳俊  桑有顺  冯焱  陈涛  李倩 《中国农学通报》2021,37(29):1-6

旨在满足马铃薯生产中茬口衔接、机械化生产技术应用、不利气候下稳产等对马铃薯出苗早、齐、壮的需求,以‘费乌瑞它’为供试品种,用基于有益活菌或工程菌提取物的5种生物制剂进行种薯处理,对多重性状进行了对比分析。5种生物制剂较常规化学制剂,均能够不同程度地促进种薯萌芽和芽根同生,出苗期提前2~7天,播种后49天的出苗率提高3.33%~17.78%。其中,表现最好的为酵母核苷酸衍生物和VDAL,种薯萌发和生根均显著高于对照。霜冻后,生物剂拌种处理在恢复前期促进植株生长,由此促进恢复后期的块茎发育,较常规化学处理增产8.39%~24.03%,体现了不同程度的保产效果。多马道黑、酵母核苷酸衍生物、根肽和VDAL体现出较好的保产效果,可作为种薯处理剂投入马铃薯生产。  相似文献   

拖拉机室内台架试验技术现状与展望     

陶倩文  闫祥海  仝一锟  闫宇翔  徐立友 《中国农机化学报》2021,42(12):121

作为拖拉机研发的重要验证手段，拖拉机室内台架试验可方便高效地为拖拉机模拟各种工况下的性能表现。首先探究动力总成控制技术、负载模拟技术、试验数据处理技术和试验结果评价技术4种拖拉机室内台架试验关键技术，结合试验技术的最新研究进展，对4种技术进行详细的阐述和分析。接着从动力总成控制算法、负载模拟算法、试验数据处理方法、试验结果评价指标体系4个方面对拖拉机室内台架试验技术进行讨论与展望。最后得出对动力总成算法进行优化、提高动态负载模拟精度、保持试验数据处理方法的前沿性、对试验结果综合客观评价是拖拉机室内台架试验技术的发展趋势，以期为我国拖拉机室内台架试验技术的发展提供参考。  相似文献   

不利气象条件对果业生产的影响及果园管理建议     

高文胜  王海波  李明丽  李国栋  李林光 《落叶果树》2020,52(3):5-7

针对近年来不利气象条件频发情况,分析了不利气象条件对果业生产的影响,提出减轻不利气象条件对果树影响的建议和不利气象发生后果园的管理要点。  相似文献   

Influence of soil phosphorus status,texture, pH and metal content on the efficacy of amendments to pig slurry in reducing phosphorus losses     

《Soil Use and Management》2018,34(1):1-8

Cost‐effective strategies for using chemically amended organic fertilizers need to be developed to minimize nutrient losses in surface and groundwater. Coupling specific soil physical and chemical characteristics with amendment type could increase their effectiveness. This study investigated how water‐extractable phosphorus (P) was affected by chemical amendments added to pig slurry and how this effect varied with soil properties. A 3‐month incubation study was conducted on 18 different mineral soils, stored at 10 °C and 75% humidity and treated with unamended and amended slurry which was incorporated at a rate equivalent to 19 kg total P (TP )/ha. The amendments examined were commercial‐grade liquid alum, applied at a rate of 0.88:1 [Al:TP ], and commercial‐grade liquid poly‐aluminium chloride (PAC ), applied at a rate of 0.72:1 [Al:TP ]. These amendments were previously identified by the authors as being effective in reducing incidental losses of P. The efficacy of the amendments varied with the soil test P, the degree of P saturation (DPS ) and the Mehlich aluminium, iron and calcium, but not soil texture. Chemical amendments were most effective in soils with DPS over approximately 20%. Due to their high cost, the incorporation of amendments into existing management practices can only be justified as part of a holistic management plan where soils have high DPS .  相似文献   

预应力薄腹梁质量事故的分析及鉴定     

张国志  王晓军 《东北林业大学学报》1994,22(4):115-119

阐述了某工程由于施工原因，导致预应力混凝土工字形屋面梁强度不足的预制构件的检验鉴定过程和方法。采用回弹法推定混凝土实际强度；通过静载试验测试构件的实际挠度、抗裂和承载能力。分析了导致混凝土强度不足的原因。  相似文献   

铯－134在幼龄茶树叶片中的分布特点     

徐寅良  陈传群 《浙江大学学报(农业与生命科学版)》1994,(1)

茶树上喷洒￣（１３４）Ｃｓ后，老叶上的沉积量和新叶上的吸收量均按指数回归形式下降，下降的速率以老叶上最快，春茶叶和夏茶叶上次之，秋茶叶上最慢；灌溉和土壤中拌入￣（１３４）Ｃｓ后，茶叶对￣（１３４）Ｃｓ的吸收分两个阶段进行，前期随着时间延长而增加。后期则减少。吸收量有个最大值；茶叶中￣（１３４）Ｃｓ的含量在喷洒情况下比灌溉和拌土的高。  相似文献   

小鼠H-Y单克隆抗体ELISA检测方法的建立   总被引：2，自引：0，他引：2  

杭苏琴  刘为敏  牛树理  冯紫云 《中国兽医学报》2004,24(6):547-549

以纯系 BAL B/ c雄性小鼠脾细胞腹腔注射免疫同系雌性小鼠 9次 ,获得的抗血清经雌、雄鼠脾细胞吸收后用于精子细胞毒性试验 ,测得 H- Y抗血清效价为 1/ 16 0。选取免疫应答最好的雌鼠脾细胞与 SP2 / 0骨髓瘤细胞融合 ,用精子细胞毒性方法筛选效价较高的细胞株制备腹水 ,建立优化的 EL ISA反应条件。优化后的 EL ISA反应条件为 :抗原4℃过夜 ,加 H- Y抗血清 37℃反应 12 0 m in,加 HRP- Ig G 37℃反应 30 min,加 TMB 2 5℃ 30 min。优化后的 EL ISA与常规 EL ISA比较 ,可以明显降低阴性吸光值 ,检测灵敏度从 1/ 32 0上升为 1/ 12 80  相似文献   

An evaluation of the Olsen test as a measure of plant-available phosphorus in grassland soils derived from basalt parent material     

A.A.W. Bell  J.S. Bailey  R.V. Smith 《Soil Use and Management》2005,21(3):322-329

Abstract. Anecdotal and circumstantial evidence have suggested that the Olsen test underestimates plant-available phosphorus (P) in basaltic soils in Northern Ireland. Therefore, the ability of this test to predict plant-available P in basaltic (and non-basaltic) soils was investigated by regressing Olsen-P data against herbage P indices calculated from plant tissue test data using the diagnosis and recommendation integrated system. The average Olsen-P concentration for a range of fields situated on basaltic soils was considerably lower than the average Olsen-P concentration for a range of fields situated on non-basaltic soils, and yet mean sward P status, as given by the herbage P indices, was similar for both groups of fields. Herbage P indices were also much better correlated with Olsen-P measurements in non-basaltic soils than in basaltic soils. Furthermore, at low Olsen-P values (≶9mgPL⁻¹) some swards on basaltic soils were genuinely deficient in P, while others were sufficient or even in surplus for this nutrient. The results confirm that Olsen-P is inadequate as a predictor of plant-available P in basaltic soils. It is concluded that an alternative soil test is needed to provide a reliable assessment of plant-available P in basaltic soils, to prevent overuse of fertilizer and manure P and to minimize the amounts of P entering local watercourses.  相似文献   

辣椒夏季品比试验报告     

杨朝进  陈炳金  魏智勇 《辣椒杂志》2004,2(1):14-16

为了考察我公司新推广品种及新配组合在高温伏旱状况下的适应性，我们于2003年5月7日在公司试验基地进行了品种对比试验。结果表明新推广品种中有九个品种或组合为极耐热或耐热，一个品种耐热性稍差。新配组合中部分表现优良，有推广前景。  相似文献