【摘 要】
:
苏北沿海棉区是江苏省的主要棉产区。1982年棉田面积为216.2万亩,占耕地面积的46.6%,占全省棉田面积的19.9%。全区系江河冲积平原,地势平坦,土层和地下水中的可溶性盐占80~85
论文部分内容阅读
苏北沿海棉区是江苏省的主要棉产区。1982年棉田面积为216.2万亩,占耕地面积的46.6%,占全省棉田面积的19.9%。全区系江河冲积平原,地势平坦,土层和地下水中的可溶性盐占80~85%。土质大部为砂壤土和粉砂壤土。毛管作用强烈,土壤易返盐。多年来,本区针对土壤盐、板、瘦的特点,
Northern Jiangsu coastal cotton area is the main cotton producing area in Jiangsu Province. In 1982, the area of cotton fields was 2,162,000 mu, accounting for 46.6% of the total cultivated land area, accounting for 19.9% of the total area of cotton fields in the province. The whole area is a river alluvial plain, with flat terrain, with 80-85% soluble salts in soil and groundwater. Most of the soil is sandy loam and silty loam. Strong capillary effect, the soil is easy to return salt. Over the years, the area for the characteristics of soil salt, board, thin,
其他文献
微量营养元素的研究,国内外已有不少报道。在我国,芝麻微量元素的研究甚少。黄淮平原是我国芝麻主要产区,芝麻单产徘徊在25—50公斤。为了探讨芝麻施用微肥的增产效果,1982
The scale-free power-law behaviour of the statistics of the download frequency of publications has been reported,for the first time to our knowledge. The data o
魏新身上有很多标签,文化学者、央视《百家讲坛》栏目开播以来最年轻主讲人、作家、编剧、诗人……2015年,一个名为“魏道泉城”的公众号,将他的诸多标签串联起来,又创造了新的标签。 魏道泉城:不同身份的魏新集结成一个魏新 2013年底,“魏道泉城”横空出世;2014年底,魏新开始有意识地在公众号发布文章。天马行空、幽默诙谐、接地气与高大上紧密结合的文风,为“魏道泉城”积累了数万粉丝,一时间,济南文
We report the experimental results of a large-aperture biased semi-insulating GaAs photoconductive dipole antenna, with a gap of 3mm between two Au/Ge/Ni electr
请下载后查看,本文暂不支持在线获取查看简介。
Please download to view, this article does not support online access to view profile.
作为广播电台的品牌类节目,脱口秀在节目品牌、主持人品牌的梳理和推广上,如何结合线下活动?答案是剧场版脱口秀。广播媒体迎来新的时代,在“互联网+”的框架下,更需线上线下
本文介绍了安徽省广播电视卫星地球站供配电系统优化改造的实施工作。改造后的系统可以在外电断电的情况下自动无缝倒换并提供最多三小时的稳定供电。
This article describ
It is well known that when given a null geodesic γ0(λ) with a point r in (p, q) conjugate to p along γ0(λ), there will be a variation of γ0(λ) which can g
An InGaN multiple-quantum-well (MQW) violet-light-emitting diode (LED) is grown by low-pressure metalorganic chemical vapour deposition. It is found that photol
We present an approximate method for calculating the thermoelectric effciency. The method has a high precision and is applicable to almost all of the thermoelec