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玉米高产优质研究──Ⅲ吉林省西部地区玉米光温生产力的验证试验 被引量:1
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作者 王鹏文 张明 +1 位作者 戴俊英 赵桂坤 《吉林农业科学》 CSCD 北大核心 1996年第3期21-23,共3页
本文通过田间试验验证,在充足的水肥供应和最佳生长环境条件下,吉林省西部地区玉米最高实际产量可以接近当地光温生产潜力的理论值,为该地区玉米的高产和超高产栽培提供了理论依据。
关键词 玉米 光温生产力 产量 吉林西部地区
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苏南太湖稻区稻茬小麦光温综合生产力 被引量:2
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作者 葛自强 董明辉 +1 位作者 顾俊荣 陈培峰 《江苏农业科学》 北大核心 2014年第10期68-72,共5页
研究不同播期及播种量对稻茬小麦扬麦16群体生长及产量的影响。结果表明:越冬期与拔节期小麦株高随着生育期的推迟逐渐降低;各时期小麦株高变化趋势一致,随着播种量(基本苗)增加,株高均呈降低趋势。随着播期推迟,小麦叶面积降低。... 研究不同播期及播种量对稻茬小麦扬麦16群体生长及产量的影响。结果表明:越冬期与拔节期小麦株高随着生育期的推迟逐渐降低;各时期小麦株高变化趋势一致,随着播种量(基本苗)增加,株高均呈降低趋势。随着播期推迟,小麦叶面积降低。同一播期处理下,拔节期至抽穗期,小麦单茎干物质量逐渐增加。不同播期对小麦产量影响较大,播期太早或太晚都不利于产量形成。11月8日播期处理下,小麦产量最高。在同一用种量(基本苗)处理下,11月8日有效穗数最高。随着播期推迟,有效穗数降低。扬麦16在苏南太湖地区11月8—15日播种最佳,基本苗225万∽300万/hm2为最适。 展开更多
关键词 太湖地区 稻茬小麦 光温生产力 播期 播种量
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灌南县稻茬小麦光温综合生产力试验研究 被引量:2
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作者 徐海洋 徐士清 曾凡华 《农业科技通讯》 2013年第12期110-114,共5页
通过稻茬小麦不同播期、不同播量的光温综合生产力的试验,研究小麦茎蘖动态、生育性状、产量结构等方面对小麦产量的影响,为稻麦周年高产高效技术模式提供依据。
关键词 稻茬小麦 综合生产力 试验研究
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吉林省春玉米生产潜力估算及其时空变化特征分析 被引量:12
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作者 王冬妮 郭春明 +2 位作者 晏晓英 王杰 李军伟 《干旱地区农业研究》 CSCD 北大核心 2011年第3期249-253,共5页
对1961~2008年吉林省18个县(市)模拟光温生产力和气候生产力的时空变化特征进行了统计分析.结果表明:吉林省平均光温生产力为25 t/hm2,分布趋势是西北-东南部递减,中西部地区较高,大干25 t/hm2,东部地区较低为24.3 t/hm2,近50a来吉... 对1961~2008年吉林省18个县(市)模拟光温生产力和气候生产力的时空变化特征进行了统计分析.结果表明:吉林省平均光温生产力为25 t/hm2,分布趋势是西北-东南部递减,中西部地区较高,大干25 t/hm2,东部地区较低为24.3 t/hm2,近50a来吉林省光温生产力呈上升趋势,光温生产力年际间及年代季间变化比较小;吉林省平均气侯生产力为14.7 t/hm2,分布趋势是西北一东南递增,东部地区最高为18.1 t/hm2,中部地区次之为14.6t/hm2,西部地区最低为8.3 t/hm2,近50 a来吉林省气候生产力呈下降趋势,气候生产力年际间及年代季间变化比较大.水分是制约吉林省中西部春玉米产量的主要因子,由气候生产力和光温生产力差异计算了水分增产力,水分增产力呈西北-东南部递减. 展开更多
关键词 春玉米 光温生产力 气候生产力 数值模拟
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作物最高理论产量计算方法的应用──以合肥地区水稻为例 被引量:4
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作者 於忠祥 姚建国 《生物数学学报》 CSCD 2000年第2期189-193,共5页
本文以合肥地区水稻为例,探讨了作物最高理论产量的计算方法,即首先根据“FAO”农业生态带理论,计算出作物光温生产力指数,再根据当地的气候(主要是水分状况)对作物的光温生产力指数进行订正,从而求出作物的最高理论产量.
关键词 土地生产潜力 作物理论产量 光温生产力指数
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Study on the Variation of Ningxia Climate Productive Potential under the Returning Farmland to Forestland and Grassland Background
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作者 李剑萍 官景得 +4 位作者 刘建军 韩颖娟 王石立 马玉平 苏延勇 《Agricultural Science & Technology》 CAS 2011年第3期456-460,共5页
The key zones of returning farmland to forestland and grassland in Ningxia were studied. By using the "stepwise revised method",the climate productive potential,light and temperature productive potential in the zone... The key zones of returning farmland to forestland and grassland in Ningxia were studied. By using the "stepwise revised method",the climate productive potential,light and temperature productive potential in the zone in recent 50 years were counted. The light and temperature productive potential of corn in Ningxia irrigated area,the central arid zone and the southern mountain area presented the linear increase trend. But when considered the climate productive potentials of light,temperature and water,the numerical value was very low because of the scarce rainfall,and no agriculture without the irrigation. The light and temperature productive potential,climate productive potential of winter wheat in the central arid zone had no significant trend,but the variation range of climate productive potential was very big. The light and temperature productive potential of winter wheat in the southern mountain area had no significant variation trend,and the climate productive potential presented the weak decline trend. It illustrated that the productive of winter wheat was greatly restricted by the water content. By using the meteorological factor data which were simulated by RegCM3-WOFOST/LINGRA coupled model,the future climate productive potentials of winter wheat in the central south of Ningxia was counted. They both presented the weak increase trend. It illustrated that the climate in Ningxia was favorable to improve the yield of winter wheat after returning farmland to forestland. 展开更多
关键词 Stepwise revised method Light and temperature productive potential Climate productive potential
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Effect of Cropland Occupation and Supplement on Light-temperature Potential Productivity in China from 2000 to 2008 被引量:7
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作者 YANG Xiaohuan CHENG Chuanzhou LI Yuejiao 《Chinese Geographical Science》 SCIE CSCD 2010年第6期536-544,共9页
There are more people but less land in China,so food safety has always been a most important issue government concerned.With continuous population increase,economic development and environment protection,cropland occu... There are more people but less land in China,so food safety has always been a most important issue government concerned.With continuous population increase,economic development and environment protection,cropland occupation and supplement are unavoidable.It not only leads to the variation of cropland area,but also makes the light-temperature potential productivity per unit area different due to regional climate differentiation,therefore impacts the total potential productivity and food output eventually.So,it is necessary to analyze the climate differentiation between occupation and supplement cropland areas and to study its impact on total potential productivity,which is significant to reasonably develop natural resources and instruct agricultural arrangement.This study firstly discussed the variation and distribution of occupation and supplement croplands in China from 2000 to 2008,then analyzed the climate differentiation between occupation and supplement cropland areas and its effect on light-temperature potential productivity.The results demonstrate:1) From 2000 to 2008,the cropland variation presented occupation in the south and supplement in the north,but overall decreased.Supplement cropland was mainly from ecological reclamation(77.78%) and was mainly distributed in Northeast China and Northwest China with poor climatic and natural conditions.Occupation cropland was mainly used for construction(52.88%) and ecological restoration(44.78%) purposes,and was mainly distributed in the Huang-Huai-Hai Plain,and the middle and lower reaches of the Changjiang(Yangtze) River with better climatic and natural conditions.2) The climate conditions were quite different in supplement and occupation cropland areas.The annual precipitation,annual accumulated temperature and average annual temperature were lower in the supplement cropland area,and its average po-tential productivity per unit was only 62% of occupation cropland area,which was the main reason for the decrease of total potential productivity.3) Cropland occupation and supplement led to the variation of total potential productivity and its spatial distribution.The productivity decreased in the south and increased in the north,but had a net loss of 4.38315×107 t in the whole country.The increase of cropland area was at the cost of reclaiming natural forest and grassland resources,and destroying natural ecological environment,while the decrease of cropland area was mainly due to a lot of cropland occupied by urban-rural construction,which threatened the sustainable use of cropland resources. 展开更多
关键词 CROPLAND cropland occupation cropland supplement climate condition light-temperature potential productivity China
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Effects of Temperature, Salinity, Light Intensity, and pH on the Eicosapentaenoic Acid Production of Pinguiococcus pyrenoidosus 被引量:3
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作者 SANG Min WANG Ming +2 位作者 LIU Jianhui ZHANG Chengwu LI Aifen 《Journal of Ocean University of China》 SCIE CAS 2012年第2期181-186,共6页
The effects of temperature, light intensity, salinity, and initial pH on the growth and fatty acid composition of Pinguiococcus pyrenoidosus 2078 were studied for eicosapentaenoic acid (EPA) production potential. The ... The effects of temperature, light intensity, salinity, and initial pH on the growth and fatty acid composition of Pinguiococcus pyrenoidosus 2078 were studied for eicosapentaenoic acid (EPA) production potential. The fatty acid composition was assayed by gas chromatography-mass spectrometry, which indicated that the main fatty acids were C14:0, C16:0 and EPA. The highest EPA percentage 20.83% of total fatty acids was obtained at 20℃ with the temperature being set at 20, 24, and 28℃. Under different salinities and light intensities, the highest percentages of total polyunsaturated fatty acids (PUFAs) and EPA were 17.82% and 31.37% of total fatty acids, respectively, which were achieved at salinity 30 and 100μmol photon m-2s-1 illumination. The highest percentages of total PUFAs and EPA were 38.75% and 23.13% of total fatty acids, respectively, which were reached at an initial pH of 6 with the test range being from 5.0 to 9.0. 展开更多
关键词 Pinguiococcus pyrenoidosus TEMPERATURE light intensity SALINITY PH EPA fatty acids
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