几种肥料在西瓜上应用效果试验初报

为筛选出适应招远当地西瓜生长的最佳肥料,我们引进了圣地龙珠生物水溶肥、瑞丰氨基酸水溶肥和天达根喜欢高浓缩冲施肥3种肥料,在西瓜上开展了对比试验,现将试验结果总结如下。     

饲料脂肪水平对长吻Wei生长的影响

通过添加鱼油配制５种不同脂肪含量的饲料,以测定脂肪水平对长吻Ｗｅｉ鱼种生长的影响。鱼油加量按３％递增,范围为０－１２％,饲料脂肪含量为５％－１８％,蛋白含量４５．０％。     

钾细菌制剂在油菜种植中的应用研究

在油菜移栽时用钾细菌制剂7.5 kg·hm-2沾秧根,可促进油菜苗期的旺盛生长,有利安全越冬,翌春返青起身快,提早开花,增加一次枝梗数和长度,与对照相比,千粒质量增加0.18 g,产量增加20.27 %。     

Experiences with Rice Grown on Permanent Raised Beds: Effect of Crop Establishment Techniques on Water Use,Productivity, Profitability and Soil Physical Properties

In recent years, conventional rice production technologies have been leading to deterioration of soil health and declining farm profitability due to high inputs of water and labor. Conservation agriculture(CA) based resource-conserving technologies i.e. zero-tillage(ZT), raised-bed planting and direct-seeded rice(DSR) have shown promise as alternatives to conventional production technologies to overcome these problems. Present study was undertaken during 2009–2012 to establish an understanding of how permanent raised bed cropping system could be practiced to save water at the field application level to improve water productivity and also have the capability to enhance productivity, profitability and soil physical quality. The results showed that among different crop establishment techniques, conventional-tilled puddle transplanted rice(CT-TPR) required 14%-25% more water than other techniques. Compared with the CT-TPR system, zero till direct-seeded rice(ZT-DSR) consumed 6%–10% less water with almost equal system productivity and demonstrated higher water productivity. Wide raised beds saved about 15%–24% water and grain yield decrease of about 8%. Direct-seeded rice after ZT or reduced tillage or on unpuddled soil provided more net income than CT-TPR. The CTTPR system had higher bulk density and penetration resistance due to compaction caused by the repeated wet tillage in rice. The steady-state infiltration rate and soil aggregation( 0.25 mm) were higher under permanent beds and ZT and lower in the CT-TPR system. Under CT-TPR, soil aggregation was static across seasons, whereas it improved under no-till and permanent beds. Similarly, mean weight diameter of aggregates was higher under ZT and permanent beds and increased over time. The study reveals that to sustain the rice productivity, CA-based planting techniques can be more viable options. However, the long-term effects of these alternative technologies need to be studied under varying agro-ecologies in western Uttar Pradesh, India.     

中草药对水产动物促生长作用的研究和应用

综述了中草药的营养功能以及中草药作为饵料添加剂在水产养殖生产中的研究与应用,并对中草药饵料添加剂对水产动物的促生长机理、在应用中存在的问题及对策做了探讨。     

种植密度对香蕉生长与产量的影响

本试验探讨了山地亩植香蕉130株和150株对香蕉生长和产量的影响.结果表明,适当合理密植能充分发挥山地潜力,提高光能利用率,促使香蕉加快生长,提早抽穗,增加单位面积产量,是香蕉获得丰产、早产的基础,值得提倡.     

微生物添加剂饲喂生长肥育猪效果观察

畜产品的安全与饲料密切相关。研究表明,饲料中长期添加抗生素、化学合成药物,会造成畜产品中药物残留,污染环境,产生抗药性,危害人类健康。因此,开发环保型饲料添加剂、生产绿色动物食品,已成为国内外动物营养学家研究开发的重点。本研究根据微生物的作用机理,经反复     

复合植物活性成分对产气荚膜梭菌感染肉鸡生长性能和肠道组织形态的影响

试验采用2×2因子设计,选取264只1日龄雌性科宝肉仔鸡,分为4个处理,分别为对照(CON)组、产气荚膜梭菌感染(CP)组、复方组和复方+产气荚膜梭菌感染(复方+CP)组。对照组和CP组饲喂基础饲粮,复方组和复方+CP组在基础饲粮中添加400 mg/kg复合植物活性成分,CP组和复方+CP组肉鸡于第17～23日龄连续经口接种A型产气荚膜梭菌新鲜悬浮液(1×10⁸CFU/mL),每只鸡每天接种1 mL。试验期为30 d。结果显示,在0～16日龄和24～30日龄各组生长性能均无显著差异(P>0.05)。在17～23日龄,产气荚膜梭菌感染显著降低肉鸡平均日增重(P<0.05),且显著降低23日龄肉鸡十二指肠绒毛高度与隐窝深度的比值(V/C)和30日龄肉鸡回肠绒毛高度(P<0.05)。添加复合植物活性成分显著提高了17～23日龄产气荚膜梭菌感染肉鸡平均日增重(P<0.05)和30日龄空肠绒毛高度(P<0.05),但降低了23日龄空肠隐窝深度(P<0.05)。通过肠道基因表达分析发现,产气荚膜梭菌感染显著下调了23日龄肉鸡空肠和回肠Cla...     

光周期对卤虫摄食、生长和存活的影响

在不同光周期（０Ｌ：２４Ｄ、６Ｌ：１８Ｄ、１２Ｌ：１２Ｄ、１８Ｌ：６Ｄ和２４Ｌ：０Ｄ）下培养河北大清河盐场的卤虫,结果表明：卤虫的摄食率有随着光周期缩短而下降的趋势。大清河盐场的卤虫在不同光周期下的生长速度无显著差异,但成活率差异显著,６Ｌ：１８Ｄ组的成活率最高。建议在短光周期下培养卤虫。