银川市节能日光温室不同种植年限土壤养分动态变化研究

研究了银川市兴庆区掌政乡不同种植年限的节能日光温室土壤养分状况,以期对银川市节能日光温室土壤养分的合理管理提出理论依据.结果表明:银川市日光温室土壤磷、钾肥超标而氮肥不足,化肥施用氮、磷、钾比例失调.建议采取限制磷、钾化肥用量、改进施肥技术等措施.     

电解水浸种对苦瓜种子发芽的影响研究

研究了电解水浸种对苦瓜种子发芽的影响.研究结果表明.电解水浸种对苦瓜种子发芽有促进作用.采用酸性电解水浸种,发芽势、发芽率和发芽指数均明显提高;采用碱性电解水浸种,不仅能显著提高种子活力,还有有效抑制霉菌的作用.     

测土配方施肥对甘蔗产量与糖分的影响

在砂页岩母质发育的酸性赤红壤上种植甘蔗新台糖25号,进行测土配方施肥试验研究。结果表明：测土配方施肥对提高甘蔗产量、糖分含量具有明显的促进作用,与常规施肥和不施肥相比,产量分别增加6.53t/hm2和40.24t/hm2,增长7.5%和75.2%;糖分含量分别提高0.8%和1.8%;产糖量分别增加1629.2kg/hm2和6919.6kg/hm2,增长12.5%和89.8%;生产成本降低454元/hm2,净增效益分别增加2935元/hm2和8813元/hm2,增长11.2%;和43.3%,增产增收效果显著。     

甘蔗测土配方施肥的研究进展

综述了甘蔗的需肥规律、甘蔗最佳施肥配方、测土配方施肥在甘蔗生产上的应用效果及甘蔗专用复合肥的研究,并提出了甘蔗测土配方施肥中应遵循的原则及应注意的问题。     

酶联免疫法测定土壤中莠去津

用定量酶联免疫法对土壤中莠去津的残留进行初筛,然后对阳性样品用气相色谱-质谱法进行确证,并对两种方法的回收率、精密度及检测限进行评价。向土壤样品中分别添加0.3、1.0、3.0μg/kg浓度水平的莠去津标准品时,ELISA的平均回收率为92.20%～97.14%,变异系数为1.69%～4.11%,检测限为0.04μg/kg;GC-MS的平均回收率为85.46%～87.68%,变异系数为2.93%～4.05%,检测限为0.03μg/kg。对酶联免疫试剂盒筛选的3个阳性样品用GC-MS进行确证,测定结果基本一致,结果满意。研究表明酶联免疫法重复性好、准确度较高,是一种土壤中莠去津残留的快速筛选方法。     

脱落酸在平菇生产中的应用研究

试验将不同脱落酸浓度（O．1ppm、0．5ppm、1ppm、2ppm）和培养料不同含水量（65％、67％、69％、71％、73％）进行拌料接种、发菌出菇,观察平菇菌丝生长、出菇以及产量等。结果表明,脱落酸浓度为1ppm-2ppm时增水效果最佳,可使培养料含水量在69％时的菌丝满袋时间与对照培养料含水量为65％时的菌丝满袋时间相当。产量方面脱落酸浓度为1ppm,2ppm,培养料含水量69％比对照培养料含水量为65％增产35％左右。培养料含水量在71％~E对照培养特含水量、内65％增产50％左右.     

对暗褐网柄牛肝菌菌丝生长有益细菌的筛选

从用于暗褐网柄牛肝菌(Phlebopus portentosus)人工栽培的覆土和草炭中分离、纯化出40株细菌,经液体发酵试验和平板试验检测这些菌株对暗褐网柄牛肝菌菌丝生长的影响,筛选出对暗褐网柄牛肝菌菌丝生长有明显促进作用的3株细菌(编号为:T24、T34、C1)。     

Effects of diluted and undiluted treated wastewater on the growth,physiological aspects and visual quality of potted lantana and polygala plants

In many nurseries in the Mediterranean area irrigation water supply is a major problem due to climatic conditions, and it is important to evaluate alternative water resources, such as treated wastewater, for ornamental plant production. For this reason, a nursery study was conducted in order to determine: (1) the effect of irrigation with a saline reclaimed wastewater (reused water) on the growth and visual quality of Lantana camara and Polygala myrtifolia, and (2) the effectiveness of the mixing the same water with canal water to reduce any negative effects observed with the reused water. Potted plants were irrigated with reused water, canal water and reused water diluted 50% with canal water. The results suggest that polygala can be irrigated with reused water since visual damage is minimal and growth reduction very slight, which seems to be related with the plant's low accumulation of saline ions. In lantana, reused water led to an excessive uptake of chloride, sodium and boron in the leaves, which was associated with defoliation, leaf burn, leaf chlorosis and damage to the photosynthetic apparatus, diminishing both growth and its aesthetic value. The dilution of reused water alleviated some negative effects in lantana, but not sufficiently to avoid a significant loss of plant quality.     

Short-term effects of de-oiled olive pomace mulching application on a young super high-density olive orchard

A two-year field experiment was performed in order to evaluate the suitability of de-oiled olive pomace for soil management in a young super high-density olive orchard. In the literature there are not works on this topic.     

Temporal association of potato tuber development with susceptibility to common scab and Streptomyces scabiei‐induced responses in the potato periderm

Using hydroponics and novel non‐destructive pot culture systems which enable inoculation at specific tuber development stages, the dynamics of common scab infection patterns in potato were studied in order to provide more precise identification of tuber physiological factors associated with susceptibility. At the whole‐tuber level, infection percentages were greatest when Streptomyces scabiei inoculation occurred early; at 2 weeks after tuberization (WAT) 68% of tubers became infected, contrasting with late inoculation (8 WAT), when only 4% infection occurred. The first‐formed internodes were most susceptible to infection, whilst later‐forming and slower‐expanding internodes were less susceptible. Detailed tuber physiological examination of internode 2 showed that pathogen‐induced changes, including increased phellem (periderm) thickness, cell layers and phellem suberization (key physiological features believed critical to S. scabiei infection) were promoted through S. scabiei inoculation. Sequential harvesting showed enhanced phellem suberization (28% greater than the control) within 7 days of pathogen exposure, while phellem thickness and layer responses were also initiated early in the infection process (10–14 days after pathogen exposure) and these responses were independent of symptom expression. Differences in cultivar response were observed, with greater phellem suberization observed 10 days after tuberization (DAT) in the common‐scab‐tolerant cv. Russet Burbank than in the susceptible cv. Desiree. Likewise, Russet Burbank had thicker and more numerous cell layers in the phellem (up to eight cell layers) during early tuber growth (20–30 DAT) than Desiree (up to six cell layers).