我国天然二氧化碳气藏地质特征及其开发应用     

阎俊峰  翟羽羿  何春娥 《化工矿产地质》1988,(2)

<正> 一、概述二氧化碳为无色、无臭、不助燃的气体,又称碳酸气。近年来,作为一种有用气体逐渐被人们所认识,但迄今仍未把已发现的天然二氧化碳(以下以符号CO_2代表)作为一种新的矿种列入国家储量表。当今一些发达的工业国家,一方面利用工厂的废气或燃烧重油,人工生产液态二氧化碳,另方面十分重视开发利用天然CO_2资源。美国、日本、加拿大、苏联、南斯拉夫等国,把天然CO_2应用于国民经济的许多领域。如饮料工业,利用CO_2易溶于水的性质,用作发泡剂、充  相似文献   

应用¹⁵N稀释技术定量华北平原大气氮沉降的输入总量（英文）     

何春娥  刘学军  张福锁 《资源与生态学报(英文版)》2010,1(1):75-82

本文采用定量氮沉降总量的ITNI（Integrated Total Nitrogen Input）系统,利用¹⁵N稀释原理和生物监测技术,定量研究了华北平原大气氮沉降的农田输入总量及其在推荐施肥中的作用。结果表明,以玉米和小麦为指示植物,监测到在玉米-小麦轮作体系中整个华北平原大气氮沉降的输入总量高达80-90 kgN ha^-1yr^-1,对玉米和小麦植物有效性的沉降氮总量约为50 kgN ha^-1yr^-1。以黑麦草为指示植物,监测到华北平原大气氮沉降的输入总量约为100 kgN ha^-1yr^-1,对其植物有效性的沉降氮约为76 kgN ha^-1yr^-1,占总沉降氮的77%。由于华北平原小麦季扬尘较多,因此干沉降可能是该时期大气氮沉降输入总量的主要贡献。  相似文献   

氮肥及秸秆有益于提高设施番茄土壤芽孢杆菌及假单胞菌的种群数量     

葛晓颖  陈清  孙志刚  何春娥  李涛  欧阳竹 《资源与生态学报(英文版)》2015,6(5):293-301

Root zone N management can reduce N fertilizer input and avoid nitrate pollution in greenhouse tomato production; however, little information is available on how reduced N affects soil microbes, especially dominant bacteria populations in long-term continuous greenhouse systems. This study investigated the effects of different combinations of N and straw on the population size of soil total bacteria and two dominant bacteria (Pseudomonas spp. and Bacillus spp.), and microbial community structure in a 6-year greenhouse tomato trial. The treatments were basal fertilizer (10 t ha-1 chicken manure; control), conventional high N treatment [600 kg N ha-1], conventional high N treatment with wheat straw, reduced N treatment [300 kg N ha-1 less than conventional], and reduced N treatment with wheat straw. Six years of reduced mineral N fertilization did not lead to a decrease in fruit yield. Both mineral N fertilizer and straw increased the numbers of soil bacteria (Bacillus spp. and Pseudomonas spp.) compared with the control, but the numbers were not affected by the amount of mineral N fertilizer (high vs reduced). Different denaturing gradient gel electrophoresis patterns were evidence that soil bacterial communities were changed by N treatments and straw application, but little difference in bacterial diversity was detected between high N and reduced N treatments. These results indicated that a reduction in N fertilizer input was possible in greenhouse tomato production and was beneficial in sustainable agriculture.  相似文献