“十三五”信阳花生发展展望

正花生是我国主要的油料和经济作物,在国民经济发展中占有重要地位,特别是在当前国内食用植物油生产量不足需求量的40%、需大量依赖进口的情况下,花生生产显得尤为重要。目前,我国花生种植面积已达到4 500khm2,总产16 000kt左右,分别占我国油料作物的33%     

广西南宁:走出“蕉”虑 悄然变革

正2014年3月,记者曾在广西南宁进行了一场为期10天的调查采访,专门就影响整个广西地区的寒潮霜冻以及南宁市周边的土地流转和经济作物种植情况进行了实地调研。时隔两年,当记者再次深入南宁,踏上这片熟悉的土地,在初春的寒意中,迎面而来的不仅仅是春耕的热浪,也感受到一种悄悄变革的力量。     

“稷丰”抗旱保水剂在农林作物上的应用技术

新春伊始,正是种植户播种耕耘的时节,各地的植树造林、建植果园和烟叶、茶叶等经济作物开始新一年生产.然而,云南省的有效耕地大多在山坡,山地水源匮乏,灌溉需投入大量设施和劳力肩挑机抽,如果投入不足则只有靠天吃饭,致使许多农户终年辛劳而经济收益长年低下.     

草莓“晶瑶”促成栽培技术

“晶瑶”系湖北省农业科技创新中心经济作物研究分中心（湖北省农科院经济作物研究所）选育的草莓优良新品种．2008年通过了湖北省农作物品种审定委员会的认定。     

“四全水溶”——让辣椒“火辣辣”

<正>河南省内黄县种植的经济作物主要是辣椒、茄子和番茄,采用与西瓜和甜瓜轮作的方式种植。为了提升云天化品牌在内黄市场的知名度,让农民真实感受到云天化"四全水溶"复合肥的效果,特做此试验示范。选取农户5亩大棚辣椒作为试验示范地,施用云天化"四全水溶"13-5-27+TE复合肥;对照田施用其它品牌16-6-38+TE大量元素水溶肥。     

与鸿雁共“舞”

农活忙时，山东省梁山县梁山镇的“农业服务”业务便受到村民的欢迎。 梁山镇地处城区，近年来，梁山镇大力实施“工业强镇、三产兴镇”战略，工业经济总量、质量得到提升，商贸流通日趋繁荣。目前，全镇5万人口有近2万多人务工经商，农村青壮年劳动力大量务工经商导致农业劳动力相对短缺。随着农业产业结构的调整，在县农村信用社小额贷款扶持下，许多农民种植水果、蔬菜等经济作物面积越来越大，     

推广“双低一高”优质油菜的重要性及主要技术措施

油菜是我区第一大经济作物,既是当前我区食用植物油的主要来源,又是我区主要的养地作物之一。发展油菜生产,不仅能解决人们食油的需求,增加群众收入,且能为粮食生产提供大量的优质肥料,还能为牲畜提供良好的饲料,有利于发展农牧结合的农区畜牧     

“格瑞龙”有机肥在西瓜上的应用效果

西瓜是一种适合各地种植的高产经济作物,因其含糖量高,味道鲜美,是消夏解暑的佳品,深受人们的喜爱。但是．由于近几年依靠大量施用化肥单纯提高西瓜产量,导致土壤质地破坏,西瓜生存的环境受到影响,品质下降,更为严重的是很多西瓜已失去原。有的风味,人们的购买欲望急剧减退．已成为制约西瓜进一步发展的程度。     

试论魏晋南北朝时期经济作物中的商品成份问题

从总体上说，魏晋南北朝时期的农业是自给自足的自然经济，其生产目的主要为了满足劳动者自己需要，而不是出于交换目的。但是，我们也无法否认，就是在农业领域中，由于生产、生活和其它方面的原因，人们的经济活动与市场也发生了一定的联系。这种现象，尤以经济作物的种植最为明显，不仅体现了当时商品经济的发展水平，而且影响到了阶级结构。阶级关系等一系列重大问题，因此对其进行专门探讨，是有十分重要意义的。 一、经济作物种植中的商品发展 魏晋南北朝时期商品性经济作物的种植，包括专门的商品生产和非商品的生产者生产的产品投放…     

小椰子串起“一带一路”科技大合作

<正>椰子在"一带一路"沿线主要热区国家都有种植,更是东南亚各国和太平洋岛国的主要经济作物。近年来,中国热带农业科学院椰子研究所(以下简称"热科院椰子所")以椰子为媒,积极加强国际科技交流合作,支持国内农业企业走出去。1用实力助力他国椰子产业2018年,热科院椰子所研究专家几乎每个月都要出趟国,先后去了越南、柬埔寨、泰国、密克罗尼西亚等八九个国家。出去的目的只有一个,加强2国椰子产业合作交流。"没想到密克罗尼西亚联邦总统克里斯琴专门花了半天时间接见专家团,讨论培训及资源普     

Hotspots, basalts, and the evolution of the mantle

The trace element concentration patterns of continental and ocean island basalts and of mid-ocean ridge basalts are complementary. The relative sizes of the source regions for these fundamentally different basalt types can be estimated from the trace element enrichment-depletion patterns. Their combined volume occupies most of the mantle above the 670 kilometer discontinuity. The source regions separated as a result of early mantle differentiation and crystal fractionation from the resulting melt. The mid-ocean ridge basalts source evolved from an eclogite cumulate that lost its late-stage enriched fluids at various times to the shallower mantle and continental crust. The mid-ocean ridge basalts source is rich in garnet and clinopyroxene, whereas the continental and ocean island basalt source is a garnet peridotite that has experienced secondary enrichment. These relationships are consistent with the evolution of a terrestrial magma ocean.     

Climate change, deforestation, and the fate of the Amazon

The forest biome of Amazonia is one of Earth's greatest biological treasures and a major component of the Earth system. This century, it faces the dual threats of deforestation and stress from climate change. Here, we summarize some of the latest findings and thinking on these threats, explore the consequences for the forest ecosystem and its human residents, and outline options for the future of Amazonia. We also discuss the implications of new proposals to finance preservation of Amazonian forests.     

Diamonds, Eclogites, and the Oxidation State of the Earth's Mantle

The reaction dolomite + 2 coesite --><-- diopside + 2 diamond + 2O(2) defines the coexistence of diamond and carbonate in mantle eclogites. The oxygen fugacity of this reaction is approximately 1 log unit higher at a given temperature and pressure than the oxygen fugacities of the analogous reactions that govern the stability of diamond in peridotite. This difference allows diamond-bearing eclogite to coexist with peridotite containing carbonate or carbonate + diamond. This potential coexistence of diamond-bearing eclogite and carbonate-bearing peridotite can explain the presence of carbon-free peridotite interlayered with garnet pyroxenites that contain graphitized diamond in the Moroccan Beni Bousera massif at the Earth's surface and the preferential preservation of diamond-bearing eclogitic relative to peridotitic xenoliths in the Roberts Victor kimberlite.     

Pre-Columbian urbanism, anthropogenic landscapes, and the future of the Amazon

The archaeology of pre-Columbian polities in the Amazon River basin forces a reconsideration of early urbanism and long-term change in tropical forest landscapes. We describe settlement and land-use patterns of complex societies on the eve of European contact (after 1492) in the Upper Xingu region of the Brazilian Amazon. These societies were organized in articulated clusters, representing small independent polities, within a regional peer polity. These patterns constitute a "galactic" form of prehistoric urbanism, sharing features with small-scale urban polities in other areas. Understanding long-term change in coupled human-environment systems relating to these societies has implications for conservation and sustainable development, notably to control ecological degradation and maintain regional biodiversity.