稻田紫云英肥饲兼用的技术与效益

紫云英不仅是稻田的优良绿肥，而且是养猪的优质青饲料。实行紫云英肥料兼用，是提高绿肥的经济效益，促进稻区农牧业发展，维持和提高土壤肥力，建立持续农业生产体系的重要措施     

生物有机肥在苦瓜、豆角栽培上的应用研究

对苦瓜、豆角实施新生力生物有机肥应用效果试验,结果表明:施用新生力生物有机肥能显著提高苦瓜、豆角的产量,与施用进口芬兰复合肥相比,平均每公顷增产苦瓜4639.5kg,增产豆角5568.0kg,增幅分别为15.9%和25.1%;同时又能改善苦瓜、豆角的外观和食用品质,增加土壤有机质和速效养分含量,改良土壤,培肥地力。生产上推广应用新生力生物有机肥,对促进生态农业的建设与发展极具意义。     

冀东稻区水稻磷钾锌肥配方施肥试验初报

采用正交二次旋转组合设计方法,进行了冀东稻区水稻的磷、钾、锌肥的配方施肥试验,建立了水稻产量与磷、钾、锌肥施用量间的回归方程,通过数学模拟筛选了磷、钾、锌肥的最佳组合方案,其方案为磷肥量125．40kg/hm2、钾肥量为44．25kg／hm2,锌肥量为4．80kg／hm2,为冀东稻区的水稻高产优质栽培提供了一个施肥模式。     

夏大豆施肥效应研究

试验结果表明,复播大豆各施肥处理较对照明显增产,差异达极显著水平;每公顷追施尿素75kg、普钙187.5kg,单产最高;在施肥总量一定时,苗期和分枝期或始花期两次追施较苗期一次追施效果好。     

The response of normal and iron anemic calves to nasal infection with an attenuated strain of parainfluenza-3 virus.

Calves with experimentally induced iron deficiency anemia and normal calves, both groups deprived of colostrum, were exposed to intranasal instillation of an attenuated parainfluenza-3 virus strain.The calves became infected, but there was no difference in the clinical picture between the 2 groups of calves. Neither was there a difference in the humoral or local immune response to parainfluenza-3 virus.     

红壤稻田养地体系的研究Ⅰ．有机、无机肥结合对红壤稻田生产效率的影响及其养地效果

多点定位田间试验表明．在福建中低产红壤稻田中混合施用有机和无机肥料，可使水稻生产效率在短期内得到稳定增长（３０％－９２％）．经统计分析比较，水稻生产效率与有机无机总养分（或总氮）投入量呈极显著相关；有机无机肥结合的优点主要表现在土壤生产力的稳定积累和元素生产效率的提高．参试的４大有机给源配合半量化肥的作用近于等效，但在试验期限内（１－３ａ），稻谷产量无额外的互作效应，而绿肥鲜体在增产养地配合效应上具有明显的优势．     

磁混肥用量对低山黄壤小麦的生产效应研究

西方研究了低山黄壤土磁混肥施用量对小麦的效应结果表明，磁混肥具有促进小麦生长，提高叶绿素含量，增进有机物质形成的作用，比习惯用肥增产１０％－１５％，并能改善小麦品质。冷沙黄泥土磁混肥最佳用量为２２００ｋｇ／ｈｍ＾２。     

Spring Barley Responses to Nitrogen Fertilizer and Ethephon in Regions with a Short Crop Growing Season

Aspects of intensive management practices such as high N fertilization inputs and plant growth regulator use could potentially increase cereal yields in regions with a short crop-growing season and occasionally dry and hot weather. A field experiment was carried out for four years (1987 to 1990) at Agronomy Research Centre of McGill University, Canada to evaluate the response of spring barley ( Hordeum vulgare L.) cv. Cadette, Laurier and Leger to N rates (0, 70 and 140 kg N ha⁻¹) and ethephon (2-chloroethyl phosphonic acid) growth regulator treatment. The application of higher than conventional N level (70 kg N ha⁻¹) did not increase barley yields under dry weather conditions and when the soil N resources were high. The high levels of N did increase the grain crude protein concentration by 2 to 10 g kg⁻¹, as did ethephon treatment. The feed quality of spring barley was improved. Ethephon treatment reduced grain yield due to a severe reduction in the number of grains spike⁻¹, and/or 1000-grain weight, although the number of spikes m⁻² was increased. Thus, the overall effect of ethephon treatment on yield was inconsistent and was influenced to a large extent by the prevailing weather conditions.     

阿荣旗旱作丘陵区春玉米配方施肥的研究

春玉米是内蒙古自治区呼伦贝尔盟岭南旱作丘陵区的重要粮食作物。施肥不足,氮、磷配比不合理是该地区玉米低产的重要影响因素。1987～1989年在该地区的中部阿荣旗25个试验点上进行了测土配方施肥的研究,经统计分析,提出了不同土壤肥力条件下氮,磷效应函数;并根据碱解氮、速效磷的土测值确定最佳施肥量的推荐,为岭南旱作丘陵区春玉米丰产栽培提供了施肥依据。