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The Division Method of Winter Wheat Drought Risk Zones in Hebei-Shandong-Henan under Irrigation Conditions 被引量:4
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作者 张文宗 张超 +1 位作者 赵春雷 刘晶淼 《Agricultural Science & Technology》 CAS 2010年第3期123-128,共6页
The average rainfall in whole growth period of winter wheat to plus or minus several times of sample variance was used to define different grades of drought.The reduction rate of production in meteorological which was... The average rainfall in whole growth period of winter wheat to plus or minus several times of sample variance was used to define different grades of drought.The reduction rate of production in meteorological which was equal to or greater than the rate of 3% was taken as standards to define wheat drought disaster years.The average reduction ratio of production in the wheat drought years in Hebei-Shandong-Henan was calculated.The frequency distribution rule of wheat in different drought disaster strength of winter wheat in Hebei-Shandong-Henan was analyzed.According to the conception and calculation method of drought disaster risk index of winter wheat,the regional distribution law of drought disaster risk index of winter wheat was analyzed.The division technical methods of winter wheat drought disaster risk zones in Hebei-Shandong-Henan under the irrigated conditions were put forward.Taking the average reduction rate of production in drought years,drought disaster risk index and precipitation of winter wheat in growth periods as indices,using the statistical analysis and overlay function of GIS,the production reduction risk of winter wheat caused by drought disaster in winter wheat zones of Hebei-Shandong-Henan was divided and evaluated.The risk evaluation of production reduction of winter wheat in different risk zones under different climate conditions was realized.The disaster prevention and mitigation measures of winter wheat drought were given. 展开更多
关键词 Hebei-Shandong-Henan Winter wheat drought Risk assessment and division
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香港五月中旬药市行情分析
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作者 欣欣 《中国现代中药》 CAS 1999年第3期40-41,共2页
十五天的广州春季交易会,没有给香港市场带来轰动的药材行情信息。香港五月中旬药材价多平稳,港市生意只是差强人意。加工纹党市趋平稳,港商以销定进,以小批量交投多见。加工太子参每担沽7200元(单位:港元/司马担,每司担=60.48公斤下同)... 十五天的广州春季交易会,没有给香港市场带来轰动的药材行情信息。香港五月中旬药材价多平稳,港市生意只是差强人意。加工纹党市趋平稳,港商以销定进,以小批量交投多见。加工太子参每担沽7200元(单位:港元/司马担,每司担=60.48公斤下同),价尚高。此品在内地药市批价有新回顺。近在安徽亳州药市。 展开更多
关键词 行情分析 香港市场 穿心 “炒” 黄连 地麦冬 射干 药材行情 川泽泻 交易会
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Agricultural Supply-side Reform on the Loess Plateau
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作者 ZHANG ZHENGBIN DUAN ZIYUAN 《China Today》 2016年第10期64-66,共3页
THE Loess Plateau of Shaanxi Province has traditionally been a poverty-stricken area.Local farmers would grow grains like winter wheat and spring corn,and every July,August,and September plow the fields and collect ra... THE Loess Plateau of Shaanxi Province has traditionally been a poverty-stricken area.Local farmers would grow grains like winter wheat and spring corn,and every July,August,and September plow the fields and collect rain water.The plateau featured desolate scenery with dry,powdery,wind-blown soil,with barely a trace of green. 展开更多
关键词 Plateau winter plateau traditionally wheat balancing featured spent grains livestock
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种好自己的地
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作者 潘大林 《南方文坛》 1997年第3期29-30,共2页
俗话说得好,“得渔筌就响,肚饱心不慌”,意谓有成就、有所得的人,才能底气十足地说三道四。现在让我来谈创作,可就有点心底发虚。因为这两年奔忙于不官不文的边缘,几乎没写什么像样的东西,理应没有坐而论道的权利。只是既已受人之约,不... 俗话说得好,“得渔筌就响,肚饱心不慌”,意谓有成就、有所得的人,才能底气十足地说三道四。现在让我来谈创作,可就有点心底发虚。因为这两年奔忙于不官不文的边缘,几乎没写什么像样的东西,理应没有坐而论道的权利。只是既已受人之约,不谈就有托大之嫌,便聊以看客的身份来说几句,想也无伤大雅。 我想说:写作犹如种地,农民种地是为了填饱物质上的肚子,写作则是为了填饱精神上的“肚子”——填自己的,也填别人的。 农民种地不可不问收成,如果他只顾耕耘而不问收获,那他肯定是脑子有病,搞种地反被地搞了,如同我们说搞文学反被文学搞了一样。 种地要想获得好收成,当然就得花心思、下苦功。按毛主席当年定下的,就有“土肥水种密保管工”八大方面。土地太贫瘠, 展开更多
关键词 坐而论道 好收成 水灾旱灾 俗话说得好 地麦冬 上级官员 说几句 专业户 寒露风 非专业
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Ecological compensation for winter wheat abandonment in groundwater over-exploited areas in the North China Plain 被引量:2
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作者 王学 李秀彬 +3 位作者 辛良杰 谈明洪 李升发 王仁靖 《Journal of Geographical Sciences》 SCIE CSCD 2016年第10期1463-1476,共14页
The land fallow policy was adopted by central and local governments to encourage the abandonment of water-intensive crops, such as winter wheat, in groundwater over-exploited areas. At the same time, since the 1990s, ... The land fallow policy was adopted by central and local governments to encourage the abandonment of water-intensive crops, such as winter wheat, in groundwater over-exploited areas. At the same time, since the 1990s, many households in the North China Plain (NCP) have chosen to replace the winter wheat and summer maize double-cropping system with the spring maize single-cropping system. Therefore, it is crucial to identify target land parcels for winter wheat abandonment and to design reasonable and proper standards for ecological compensation prior to the implementation of the land fallow policy in the NCP. In this study, multi-level Iogit models were used with household survey data in order to detect determinants across land parcel, household and village levels on household cropping system decisions; the opportunity costs for winter wheat abandonment were also calculated using cost-benefit analysis. The results show that: (1) land quality and irrigation condition at parcel level are two essential elements influencing household cropping system decisions. Nearly 70% of the total area of poor land and more than 90% of the total area of unirrigated land has suffered winter wheat abandonment. Target land parcels for the land fallow policy should be those that are irrigated and of high quality. (2) There were no significant differences between net profits from spring maize and summer maize under similar farming conditions, and the opportunity cost for winter wheat abandonment should be equal to the net profit of winter wheat. (3) The primary purpose of the land fallow policy is to induce groundwater recovery and restoration as a preliminary stage. A higher level of 350 yuan/mu is recommended as subsidy for ecological compensation at this stage. Later, the primary purpose of the policy should be a transition to a balance between exploitation and supplementation of water resources, and a lower level of 280 yuan/mu is recommended as a subsidy at this stage. 展开更多
关键词 land fallow ecological compensation multi-level Iogit model opportunity cost groundwaterover-exploited areas
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