An interdisciplinary model of soybean yield in the Amazon Basin: The climatic, edaphic, and economic determinants

Soybean production is one of the main economic forces driving the expansion of the agricultural frontier in the Brazilian Amazon. To assess the potential for expansion we estimate a model of soybean yield that integrates the major climatic, edaphic, and economic determinants in the Amazon Basin. Yield is modeled as a function of yield as simulated by a crop physiology model that captures the effects of climate and physical attributes on the development of soybean plant; fertilizer applications; and economic/spatial parameters such as credit, transports costs and latitude. Current values of these determinants indicate that roughly 20% of Amazon Region or ∼ 1,000,000 km² (excluding protected areas) can generate yields greater than 2000 kg/ha. Soybean production may be possible over a wider area of Amazon, but realizing this potential requires improvements in economic determinants such as the transportation infrastructure.     

中国与国际大豆期货市场波动溢出效应分析

文章采用多元GARCH(MGARCH)模型,研究中国、美国和日本大豆期货市场的相关性和波动溢出效应。结果表明:在样本研究期间,大连、芝加哥和东京大豆期货交易市场之间存在正相关,大连大豆期货市场与芝加哥大豆期货的相关性要小于东京谷物交易所大豆期货与芝加哥大豆期货的相关性;大连、芝加哥和东京大豆期货交易所存在双向的波动溢出效应;在三个市场中,大连大豆期货的新息冲击和自身波动溢出值最小,但在统计上不显著,可能与目前大连期货市场受管制和相对封闭等因素有关;三个大豆期货市场市场均不存在波动持续性。     

大豆国际物流发展现状分析

大豆是世界上重要的大宗贸易农产品。本文从大豆输出国流出量、大豆输入国流入量分析了大豆国际物流流量,研究了大豆国际物流通道和美国、巴西大豆主产国国内物流通道,重点分析了中国国际采购大豆物流现状,指出其具有物流流量大、流向稳定、物流设施设备资源分散、信息流滞后的特点。     

世界豆油期货市场关联性研究：基于中美两国的实证分析

期货市场国际关联性是同一期货合约的价格在各国市场上的相互关系。本文通过采用协整检验、方差分解和脉冲响应等技术对世界最大两个豆油期货市场的关联性研究发现：大连、芝加哥交易所豆油期货价格和中国豆油现货平均价格之间存在长期均衡关系。大连豆油期货市场的影响力与权威性都比芝加哥市场强大。     

可生物降解大豆蛋白材料的改性研究

为了解大豆蛋白材料发展状况、推动大豆蛋白材料工业化发展,本文简单介绍了一种可生物降解大豆蛋白材料的组成结构与性能,并详细对大豆蛋白材料的改性进行论述,同时对其发展前景进行展望。     

大豆加工食品中呕吐毒素污染水平调查与分析

建立了酱油和豆腐乳中呕吐毒素免疫学检测的前处理方法,并首次调查了市场上酱油、豆腐乳、豆腐和大豆中呕吐毒素的污染水平,分析并证实了豆腐乳中呕吐毒素的污染主要来自原料豆腐隙头仍是大豆）而不是生产加工过程,酱油中呕吐毒素污染主要来自原料大豆。因此对大豆加工食品中呕吐毒素的污染控制,重点应放在原料大豆。     

Market reactions to trade friction between China and the United States: Evidence from the soybean futures market

In March 2018, the US used an immense trade deficit as an excuse to provoke trade friction with China. This study uses the EGARCH model and event study methods to study the impact of the major risk event of Sino-US trade friction on soybean futures markets in China and the United States. Results indicate that the Sino-US trade friction weakened the return spillover effect between the soybean futures markets in China and the US, and significantly increased market volatilities. As the scale of additional tariffs increased, the volatility of the Chinese soybean futures market declined; however, the volatility of the US soybean futures market did not weaken. In addition, expanding the sources of soybean imports helped ease the impact of tariffs on China’s soybean futures market, while the decline in US soybean exports to China intensified the volatility of the US soybean futures market. In addition, while the release of multiple tariff increases has had a short-term impact on the returns of soybean futures markets, the impact of trade friction has gradually decreased.     

大豆高产优质栽培技术和措施

通过实践和试验提出了大豆高产优质栽培技术以及介绍确保高产,优质的田间管理等技术措施。     

大豆蛋白在焙烤食品中的应用

我国大豆制品质量飞速提升,但大豆蛋白于烘烤食品中的应用仍存在诸多不足之处。本文探讨大豆蛋白在焙烤食品中的应用,并提出实用性应用措施,为烘烤食品中大豆蛋白应用提供参考依据。     

人民币升值对我国大豆进口影响的实证分析

本文采用主成分分析、单位根检验、逆变换等方法,以2005年7月至2008年6月间的月度数据为样本区间,就人民币实质有效汇率对我国大豆进口数量的影响进行了分析。实证结果表明,人民币升值和国民收入的增长对我国大豆进口的影响不是很明显,但国民经济增长对大豆进口的影响超过了人民币升值对大豆进口的影响。因而可以推断,随着我国经济的快速发展,我国大豆等农产品的进口可能会持续增长。