Shuitu Baochi Xuebao, 2021 探明单季晚稻缓释氮肥一次性施用模式中缓释氮占总施氮量的适宜比例，为单季晚稻高效施肥提供理论指导。2019—2020年在浙江省长兴县和平镇开展田间试验。试验共设6个处理：（1）不施氮肥（N0）；（2）常规施肥（U1，基肥：分蘖肥：穗肥为4：3：3）；（3）常规施肥减氮12.5%（U2，比例同U1）；（4）57%缓释氮一次性施用（SRU1）；（5）45%缓释氮一次性施用（SRU2）；（6）34%缓释氮一次性施用（SRU3）。U1的施氮量为240 kg/hm2，U2和SRU的施氮量均为210 kg/hm2 ...
张金萍 +8 more
doaj
Optimization of Cooking Conditions and Analysis of Non-Volatile Compound in Lentinula edodes Soup(香菇菌汤煮制工艺优化及其非挥发性特征风味物质研究) [PDF]
Shipin kexue jishu xuebao, 2018 In this study, the optimum preparation conditions of Lentinula edodes soup were evaluated by the single factor experiment and orthogonal experiment and then the flavor characterization and contents of non-volatile compounds in Lentinula edodes and ...
LI Biao(李标) +4 more
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Shuitu Baochi Xuebao, 2019 通过田间小区试验，研究袋控释肥对集约经营雷竹林氮磷损失的影响。结果表明：施肥后雷竹林的径流液及渗漏液中氮磷含量随时间呈现先升后降的单峰变化趋势）袋控释肥处理中径流液全氮和全磷流失量分别为1 844.43，152.58 g/hm2，比撒施肥处理减少了18.75%和40.94%）在渗漏液中，袋控释肥处理的全氮和全磷流失量为108.84，3.32 kg/hm2，比撒施肥处理减少15.35%和22.91%）施肥后7天内，撒施肥处理的氨挥发占总氨挥发量的75.06 ...
胡昱彦 +5 more
doaj
Preparation and Flavor Component Analysis of Porphyra yezoensis Flavor Essence(紫菜风味香精的制备及其风味成分分析) [PDF]
Shipin kexue jishu xuebao, 2015 The enzymatic hydrolysis of laver and preparation technology of seafood flavor were studied using Porphyra yezoensis as raw materials. By comparing the hydrolyzing ability of different enzymes and the flavor of hydrolyzates, the best enzyme was screened.
YAO Xingcun(姚兴存) +2 more
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Testing GLEAMS for Nitrate Leaching Modeling in an Agricultural Catchment of Southeast China [PDF]
, 2007 利用我国东南亚热带地区农业小流域不同土地利用方式的硝氮渗漏淋失实测数据检验了GLEAMS(Groundwater Loading Effects of Agricultural Management Systems)模型在该地区的适用性。通过现场试验和实地调查并结合模型手册,获取模型所需的水文和营养盐参数,参考模型参数的敏感性分析结果对模型进行调试。结果表明模型对水稻田除外的其它土地利用方式的硝氮渗漏淋失模拟效果较好。水稻田渗漏模拟效果差的主要原因在于模型的水分平衡方程不能反应水稻田长期淹水的实际情况 ...
徐玉裕 +3 more
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First Principles Calculation and Analysis of Adsorption of Choline Deep with Zinc Oxide [PDF]
This is an article in the field of metallurgical engineering. In order to better realize the leaching of zinc oxide from zinc-containing dust, Materials Studio software based on density functional theory was used to simulate and optimize the crystal ...
Chao YANG +4 more
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Shuitu Baochi Xuebao, 2017 通过大棚茄子—水稻轮作（GER）和大棚茄子—揭膜休闲（GEF）2种栽培模式在大棚茄子栽培期间土壤硝化作用强度、氨挥发速率和土壤水热条件指标动态变化的比较，研究了轮作水稻对大棚土壤硝化作用和氨挥发的影响。结果表明：(1)GER模式在大棚茄子各生育期土壤硝化作用强度都显著高于GEF土壤，苗期最高峰时表土和根际土硝化作用强度分别为56.6，101.4 mg/(kg·h)，比GEF土壤增加了34.8%和42.4%；（2）GER模式在大棚茄子基肥和追肥施用后土壤氨挥发速率都显著低于GEF土壤，累积氨挥发量为1 ...
王 +5 more
doaj
Assessing Nitrate Leaching With GLEAMS Model in an Agricultural Small Catchment in Southeast China. [PDF]
, 2007 应用GLEAMS模型估算我国东南亚热带地区农业小流域硝态氮的渗漏淋失。在五川流域8种不同土地利用方式的农田中埋设渗漏监测装置,每月采集水样分析硝态氮含量。用2002年4—12月作物生长季节的实测数据进行模型校验的结果表明,模型对水稻田除外的其他土地利用方式下硝态氮渗漏淋失模拟效果较好。五川流域2002年硝态氮淋失模拟计算结果表明,不同土地利用方式下硝态氮淋失时空差异显著,全年渗漏量(以氮计)为4.6438.39 kg.hm-2,流域面积加权平均为29.99 kg.hm-2。甘蔗地 ...
曹文志, 王吉苹
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Evaluation of the Effectiveness of Soil Improvement Measures in Apple Orchards on the Loess Plateau: A Meta-Analysis [PDF]
[Objective] Soil acidification, structure and fertility degradation and poor water-holding capacities are common problems in the apple orchard on the Loess Plateau, effective soil improvement techniques are crucial for enhancing soil quality, and ...
DUAN Shunxia +3 more
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Denitrification Determination in soil of Wu Chuan Agricultural Catchment and the Control Measure [PDF]
, 2007 反硝化作用是土壤氮素转化的一个重要过程,为探明五川流域内的农业土壤的反硝化作用强度及其影响因素,利用乙炔抑制-原状土柱培养法对其进行测定。通过3次试验测定,发现五川流域农业土壤具有较强的反硝化作用强度,在种植季节,土壤平均反硝化作用强度为0.1kgN·hm-2·d-1,最高达到0.6kgN·hm-2·d-1,其中蔬菜地反硝化作用强于其他土地利用类型。反硝化作用同土壤的NO3-含量、含水量、温度以及pH都存在正相关关系,它们是流域土壤反硝化作用的主要影响因子 ...
徐玉裕 +5 more
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