灌溉用水质量的化学评价

本文介绍了灌溉水质参数的计算公式和最主要的化学评价方法。这是作者对国内外自１９３５年以来六十年间有关资料学习、分析、对比和实际使用的小结，可用于生产实际。     

Mechanization of irrigated rice cropping regions in China

The mechanization of rice production in China has experienced a comparatively long and an undulating process. The full-scale making of mechanization of irrigated rice cropping regions was started at the mid 1960's, later than that of upland cropping and its average level of mechanization operation also lower than the average level of the country. During this peiod, however, a series of mechines were created, which adapted to the characteristics of rice cropping regions in China, and the foundation was laid for the later paddy field machinery. For example, transplanting machine (created in 1956), boat—shaped tractors (1961), paddy field ploughing and harrowing serial (1974), and single wheel plowing machines (1979) etc.     

大木耳子实体干湿比及营养成份分析

大木耳(Auricularia maxima)子实体的质地明显比毛木耳软,吸水性较毛木耳强.为了探明其是很有前途的木耳种.干湿比和营养成份状况,为大面积种植大木耳提供科学依据,笔者于1989～1990年进行了这方面研究,现报道如下.     

灌溉管理现代化

灌溉现代化以往被看作“工程项目”，即用管道替代开放的沟渠、使用传感器启动灌水铺放导管和平整土地。工程师也参与其中。正如坦桑尼亚一位灌溉专家所说：“我们过去在办公室设计水利项目，将计划保存在办公室。我们认为村民不可能理解这些事情。”     

柑桔树的微喷灌溉制度初探

四川省柑桔生产常受自然条件影响,产量很不稳定,尽管多年平均降雨量在1000毫米以上,雨量较为充沛,但由于受大气环流的影响,月降雨很不均衡,降雨多集中在4～6月,于夏秋果实膨大期(7～9月)雨量较少、气温较高、蒸发量大于降雨量,常出现数十天的旱期,加上大多数果园处在水源条件困难、保水力差的丘陵坡地,夏伏旱常     

棉花膜下滴灌在包头湖农场的试验推广

介绍了包头湖农场试验推广棉花膜下滴灌的情况,包括滴灌区的设计、系统安装、试验结果,对推广应用进行 了经济分析。