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金沙江干热江谷退化坡地雨养酸角林种植密度试验初报 被引量:3
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作者 李建增 纪中华 +1 位作者 沙毓沧 龙会英 《云南热作科技》 2000年第3期13-14,19,共3页
在金沙江干热河谷退化坡地利用雨养条件栽植酸角的 5种密度试验表明 ,种植密度大 ,水保效益和产量较高 ,但果实品质差 ,经济效益较低 ;种植密度小 ,水保效益和产量较低 ,果实品质较好。综合各种因素 ,在中度退化坡地种植酸角以 6m×... 在金沙江干热河谷退化坡地利用雨养条件栽植酸角的 5种密度试验表明 ,种植密度大 ,水保效益和产量较高 ,但果实品质差 ,经济效益较低 ;种植密度小 ,水保效益和产量较低 ,果实品质较好。综合各种因素 ,在中度退化坡地种植酸角以 6m× 6m栽种密度最佳。 展开更多
关键词 酸角林 种植密度 干热河谷 金沙江流域 雨养条件
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我国创造雨养春玉米超高产新纪录
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《大众科技》 2007年第11期6-6,共1页
近期,记者从吉林省科技厅了解到,吉林省农业科学院科研人员,经过多年科技攻关,创造了我国雨养条件下春玉米超高产生产面积和产量的最新纪录,其中连片的10.4亩平均亩产达到1164.55公斤。
关键词 雨养条件 超高产 春玉米 吉林省农业科学院 科研人员 科技攻关 生产面积 科技厅
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Comparison of winter wheat yield sensitivity to climate variables under irrigated and rain-fed conditions 被引量:4
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作者 Dengpan XIAO Yanjun SHEN +6 位作者 He ZHANG Juana P. MOIWO Yongqing QI Rende WANG Hongwei PEI Yucui ZHANG Huitao SHEN 《Frontiers of Earth Science》 SCIE CAS CSCD 2016年第3期444-454,共11页
Crop simulation models provide alternative, less time-consuming, and cost-effective means of deter- mining the sensitivity of crop yield to climate change. In this study, two dynamic mechanistic models, CERES (Crop E... Crop simulation models provide alternative, less time-consuming, and cost-effective means of deter- mining the sensitivity of crop yield to climate change. In this study, two dynamic mechanistic models, CERES (Crop Environment Resource Synthesis) and APSIM (Agricultural Production Systems Simulator), were used to simulate the yield of wheat (Triticum aestivum L.) under well irrigated (CFG) and rain-fed (YY) conditions in relation to different climate variables in the North China Plain (NCP). The study tested winter wheat yield sensitivity to different levels of temperature, radiation, precipitation, and atmospheric carbon dioxide (COa) concentration under CFG and YY conditions at Luancheng Agro-ecosystem Experimental Stations in the NCR The results from the CERES and APSIM wheat crop models were largely consistent and suggested that changes in climate variables influenced wheat grain yield in the NCR There was also significant variation in the sensitivity of winter wheat yield to climate variables under different water (CFG and YY) conditions. While a temperature increase of 2℃ was the threshold beyond which temperature negatively influenced wheat yield under CFG, a temperature rise exceeding 1℃ decreased winter wheat grain yield under YY. A decrease in solar radiation decreased wheat grain yield under both CFG and YY conditions. Although the sensitivity of winter wheat yield to precipitation was small under the CFG, yield decreased significantly with decreasing precipitation under the rain- fed YY treatment. The results also suggest that wheat yield under CFG linearly increased by ≈ 3.5% per 60 ppm (parts per million) increase in CO2 concentration from 380 to560ppm, and yield under YY increased linearly by ≈ 7.0% for the same increase in CO2 concentration. 展开更多
关键词 winter wheat yield sensitivity climate vari-ables crop model North China Plain
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