Results 1 to 10 of about 1,164 (108)
Effects of Continuous Straw Returning Combined with Reduced Fertilizer Application on Rice Yield and Loss of Nitrogen and Phosphorus [PDF]
, 2022 [Objective] The effects of straw returning combined with reduced chemical fertilizer application on rice yield and nitrogen and phosphorus losses with runoff were studied in order to provide a scientific basis for the recycling and reuse of local ...
Liang Fan +8 more
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Bioremediation: Perspectives of the use biopolymers systems for slow release nutrients [PDF]
, 2021 Biostimulation (microbial stimulation) is the most effective bioremediation strategy, thus it’s widely used in Brazil, and is highlighted for its simplicity and low cost.
Barcellos, Ivonete Oliveira +9 more
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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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Shuitu Baochi Xuebao, 2006 采用草莓盆栽试验研究了3种肥料类型（普通肥料、控释氮肥、控释复合肥）及其不同施肥方式对氮磷钾利用率、氮素在土壤一作物体系中的平衡及草莓生长的影响。结果表明，相对于普通肥料、控释氮肥和控释复合肥提高了土壤中有效养分的含量，促进了草莓生长，提高了草莓糖酸比和维生紊C含量。不同肥料类型间，植株干重、草莓产量和氮磷钾利用率大小顺序为：控释复合肥〉控释氮肥〉普通肥料。控释氮肥处理土壤中氮的残留率最高，其次为控释复合肥。氮的损失率大小顺序为：普通肥料〉控释氮肥〉控释复合肥。不同施肥方式间草莓糖酸比和维生素C含量 ...
邵蕾, 张民, 王丽霞
doaj +2 more sources
Shuitu Baochi Xuebao, 2006 采用包膜控释肥进行了棉花盆栽试验,并以普通复合肥作对照研究包膜控释肥对棉花的增产效应。研究结果表明,与普通复合肥相比,施用控释肥更有效提高了土壤中硝态氮和铵态氮及其速效磷、速效钾含量,经控释肥处理的棉花叶绿素相对含量、株高均比普通复合肥有明显的优势。控释肥对棉花的果枝数、桃数在各施肥水平上与普通复合肥相比不显著,包膜控释肥施用纯氮量分别在0.2,0.4 g/kg土时比相同施氮量普通复肥具有显著的增产作用,相对增产率分别为113.1%和34.5%,而且在施用量减少的情况下,仍能获得高于普通复肥的产量 ...
孙强生 +4 more
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Shuitu Baochi Xuebao, 2020 通过研究控释尿素和控释氯化钾配施对土壤供肥能力和牡丹生长的影响，为牡丹大范围种植中控释肥替代传统化肥提供理论依据。以农民习惯普通尿素配施氯化钾基肥加追肥2次的处理为对照，通过大田试验，研究不同用量控释尿素（135，270，405 kg/hm2）和控释氯化钾（90，180，270 kg/hm2）交互一次性施肥对土壤养分供应能力和"黄翠羽"品种牡丹（Paeonia suffruticosa Andr.）生长的影响。结果表明：25℃静水浸提条件下，控释尿素和控释肥氯化钾的累积养分释放率分别在84 ...
赵晨浩 +6 more
doaj
Effects of Water and Nitrogen Management on Soil Nitrogen Metabolism Enzyme Activity and Wheat Nitrogen Utilization [PDF]
[Objective] To explore the effects of water and nitrogen management on soil nitrogen metabolism enzyme activity and wheat nitrogen utilization under irrigation based on soil moisture.
CUI Zhenkun +4 more
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Study on the Synthesis and Adhesive Application of Chitosan Analogues [PDF]
, 2016 甲壳素与其脱乙酰基产物壳聚糖均可广泛用作药物载体、缓控释材料、杀菌、防腐保鲜、增强植物免疫力、活化细胞、改善土壤生态等领域。现有甲壳素及壳聚糖的生产方法存在原料分散、收集困难、污染大、成本高等问题，应用领域受限。因此，本研究选用了来源丰富、与壳聚糖结构相似的淀粉作原料，通过硫酸单酯化、成盐和氨基取代三步反应合成了壳聚糖类似物。开发的新工艺成本低、污染小、产率高，适合大规模生产。 本论文通过淀粉原料预处理及硫酸酯化的单因素探索实验确定了中和pH值为6、氨气作为中和和取代反应原料的工艺条件 ...
于静姝
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黄土高原南部不同减氮模式对春玉米产量 及土壤硝态氮残留的影响
, 2017 : 【Objectives】 Effects of different nitrogen reduction modes on yield of spring maize and soil NO3−-N residue in the southern Loess Plateau were discussed, and scientific fertilization suggestions were put forward to instruct local maize ...
党廷辉, 董强
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Single-cell protein production from black liquid by Candida utilis [PDF]
, 2013 本研究配合制浆新工艺和木质素回收工艺，成功地开发出了以制浆废液培养酵母生产单细胞蛋白的经济可行的发酵工艺，也为利用新工艺制浆废液拓展为其它微生物的营养液提供了借鉴。这是在清洁制浆和联产缓控释肥成果基础上的又一个很有价值的创新成果，进一步丰富和延伸了植物体全价开发、发展微生物产业的产业链。本论文以新工艺制浆废液为原料，对培养酵母发酵生产单细胞蛋白的各种工艺进行了探索与优化。对工业生产获得的制浆废液进行营养价值分析，结果表明：新法制浆废液含碱量少；不含蒽醌、硫化物等抑制微生物生长的有害物质 ...
范慧
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