Simulated reconstruction of soil water distribution and isotope fractionation under the influence of AMF inoculation [PDF]
, 2023 Water resources determine the vegetation structure and types in the ecological restoration process, and are the main limiting factor for achieving green production and ecological restoration in mining areas.
Lexuan TIAN, Yinli BI, Zengming KE
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Моделирование и оптимизация технологического процесса и средств механизации производства зерна для среднего Китая на базе белорусской техники [PDF]
, 2020 One of the main problems in grain production in China is the high level of unit costs (high cost price). The main reason is the low level of mechanization.
A. Leonov N. +3 more
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Comparison of fertilizer-effect models on winter wheat response to nitrogen and phosphorus fertilizers in saline soils in the Yellow River Delta [PDF]
, 2017 通过大田试验, 研究了黄河三角洲盐碱土地区冬小麦合适的肥料效应模型。在冬小麦生长季设置4种不同的氮磷肥用量, 根据“3414”试验设计8 种不同的肥效试验处理, 以探讨线性加平台、一元二次、平方根和二元二次4 种不同模型的拟合效果。结果显示, 4 种肥料效应模型的拟合结果经检验都达到极显著水平 (P<0.01)。在一元肥料效应模型中, 氮磷一元二次模型拟合效果最好, 最高收益分别为7 448.3 元·hm-2 和7 357.7 元·hm-2 ...
付希强 +8 more
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Shuitu Baochi Xuebao, 2023 为提高黄淮海平原夏玉米的灌溉效率,优化农业资源配置,依据黄淮海平原27个站点70年的试验统计资料,在作物需水量模型、降雨频率分析、作物系数相关理论的基础上,分析不同水文年型夏玉米的需水量和缺水量(即需要补充灌溉的水量)的时空分布。首先,根据各代表点的多年降雨资料,利用皮尔逊—Ⅲ型曲线确定降雨频率分别为25%,50%,75%,95%的4种水文年型及其相应的有效降雨量;其次,利用Penman-Monteith模型计算参考作物需水量,并结合作物系数法估算作物需水量,进而求得在4种水文年型下夏玉米的需水量 ...
刘栩辰 +6 more
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Shuitu Baochi Xuebao, 2004 设计5种不同供水处理进行对夏玉米根系生长和底墒利用的影响试验。结果表明，有限供水对夏玉米根长的影响效应比根生物量显著，有限供水能促使夏玉米更多地利用土壤底墒，供水少，底墒利用率高，凸现出夏玉米对土壤缺水干旱的生理性适应机制和抗旱生态反应。5种供水处理以供水151．3mm，耗水190．1mm的夏玉米产量收获指数和水分利用效率最高。改变高水高产的传统耕作观念，推行有限供水，生育期内合理调配灌水量，提高水分利用效率，发挥土壤水库的调节作用，达到稳产又节水的生态农业目的。
任三学 赵花荣 霍治国 王素艳
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Effects of Coated Potassium Chloride on Soil Nutrient Supply Intensity, Maize Yield and Quality [PDF]
[Objective] Controlled release of potassium chloride can achieve slow release of potassium ions synchronized with crop absorption, while ensuring the effectiveness of potassium ions in the soil, meeting the demand for potassium in the later stage of crop
CHEN Qi +13 more
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Environmental and economic assessment of the intensive wheat - maize production system in the North China Plain [PDF]
, 2016 To ensure food security for its vast population input intensification in crop production has been one of Chinas major strategies in the last decades.
Ha, Nan
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Pilot Exploration of Global Advanced Digital Agricultural Technologies in China’s Grain Production [PDF]
In response to the two major strategic needs of increasing national grain yield per unit area and 3rd-party professional services, this paper systematically expounds on the challenges such as climate change faced by global food production and the ...
LI Xun, PAN Chao
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Shuitu Baochi Xuebao, 2004 以不覆盖的处理为对照，研究了冬小麦期覆盖秸秆对夏玉米土壤水分动态变化及产量的影响。结果表明，秸秆覆盖有明显的增产效果。受充足的降雨影响，秸秆覆盖的保墒效果不太明显，但夏玉米的水分利用效率(WUE)有较大的提高。秸秆覆盖对表土层(0～30cm)具有明显的保墒效果，尤其是夏玉米生长前期。在深土层(100～110cm)秸秆覆盖处理的土壤含水率低于不覆盖处理，形成一个缺水带。一年两熟条件下，夏玉米可以充分利用夏季多雨的特性，结合秸秆覆盖措施，可提高对降雨的利用效率。
于舜章 陈雨海 周勋波 李全起 罗毅 于强
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Gradient distributions of nitrogen and organic carbon in the soils from inland to tidal flat in the Yellow River Delta [PDF]
, 2014 黄河三角洲是我国典型的通过黄河冲积泥沙填海造陆形成的近代沉积区。区域受到黄河冲积、沉积等自然过程和农业耕种熟化等人类活动的双重影响。本研究通过在黄河三角洲地区内陆到河口海湾不同距离采集典型土壤类型剖面发生层样品，探讨土壤有机碳、总氮等生源要素的空间分布规律，为阐明我国典型海岸带地区陆源碳、氮的输送及循环特征提供基础依据。研究结果表明，黄河三角洲内陆与河口地区呈现出完全不同的土壤碳、氮分布规律。表层土壤碳、氮含量在黄河沿岸及三角洲南部均表现出由陆向海逐级递减的空间分布特征 ...
李远 +4 more
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