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Agronomic Efficiency of Feldspar,Quartz Silica,and Zeolite as Silicon (Si) Fertilizers in Sandy Soil
Rama T. Rashad Rashad A. Hussien 《Communications in Soil Science and Plant Analysis》2020,51(8):1078-1088
ABSTRACT Partial replacement of synthetic chemical fertilizers by naturally occurring alternatives is environmentally recommended. Feldspars (F), quartz silica (S), and zeolites (Z) are silicon (Si)-rich minerals that may be utilized as Si fertilizers. This study aims to assess the agronomic efficiency (AE) of the mentioned minerals as Si fertilizers and to estimate Si-use efficiency (Si-UE) in sandy soil. A field experiment was carried out (summer seasons of 2016 and 2017) in which F, S, and Z were mixed with surface soil in an application rate 500 mg kg?1 soil with and without potassium humate (K-H, 2 mg kg?1 soil). Treatments were distributed in a complete randomized block design (CRBD) with three replicates including control before cultivation of soybean (Glycine max L.). Yield (kg ha?1) of soybean, available Si (mg kg?1) in soil and uptake (mg kg?1) of N, P, K, Cu, Fe, Mn, Zn, and Si by soybean seeds and straw were estimated. The most significant increase was by 67.87% followed by 38.69% was recorded for the S and S K-H treatments, compared to the control. Same treatments showed nonsignificant decrease in the available Si (mg kg?1) that may refer to partial replenishment of plant available Si (PAS) in soil and avoid significant deficiency. Silica treatments resulted in the most significant increase in the uptake (mg kg?1 soil) of Si, N, P, K, Cu, Fe, Mn, and Zn by seeds and almost by straw. Silica was more efficient agronomically than feldspar and zeolite. Absorption of more biocompatible Si-organo species may depend on Si source. 相似文献
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根据2018年5、8月莱州湾的生态调查资料,采用营养盐限制法则及潜在性富营养化评价模式等方法,对莱州湾无机氮(DIN)、活性磷酸盐(PO34–-P)和硅酸盐(SiO23–-Si)的平面分布、结构及限制特征进行了分析。结果显示,2018年5、8月莱州湾的DIN浓度范围为1.64~106.36 μmol/L,平均值为24.18 μmol/L,5月明显高于8月;PO34–-P浓度范围为0~2.010 μmol/L,平均值为0.182 μmol/L,8月明显高于5月;SiO23–-Si浓度变化范围为0.97~78.93 μmol/L,平均值为18.30 μmol/L,8月明显高于5月。DIN、PO34–-P、N/P高值区主要位于莱州湾西部的小清河口和黄河口附近海域;SiO23–-Si、Si/N、Si/P高值区主要位于湾底部、龙口–莱州近岸海域。对营养盐结构的分析表明,莱州湾存在明显的磷限制和枯水期的硅限制,陆源输入是莱州湾营养盐的主要来源。营养盐结构限制平面分布表明,春季莱州-招远养殖区和夏季东营-潍坊养殖区易引发赤潮,夏季莱州–招远养殖区初级生产力受到一定限制,对养殖业造成一定的影响。 相似文献
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高羊茅是一种应用范围较广的冷季型草坪草。以高羊茅种子为材料,检测了聚乙二醇(PEG-6000)模拟水分胁迫条件下,2种硅酸盐细菌对高羊茅种子萌发的影响。结果表明,PEG胁迫呈剂量效应地抑制高羊茅种子萌发,随着PEG浓度的增加,高羊茅的发芽率和发芽势显著下降。在15%PEG水分胁迫条件下,不同浓度硅酸盐细菌(胶质芽孢杆菌VKPM7519和土壤芽孢杆菌VKPM7517)浸种可提高高羊茅的萌发率,菌液浓度为105CFUml-1时效果最佳,其中VKPM7517在105CFUml-1浓度时的发芽率和发芽势均达到最大值,且差异显著,VKPM7519在105CFUml-1浓度时可提高高羊茅的平均发芽速度。可见,硅酸盐细菌浸种能促进水分胁迫条件下高羊茅种子的萌发,尤其土壤芽孢杆菌的效果最强,表现一定的抗旱潜能。 相似文献
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Suppressive effect of potassium silicate on powdery mildew of strawberry in hydroponics 总被引:1,自引:0,他引:1
Takeshi?KantoEmail author Akihiro?Miyoshi Takuya?Ogawa Kazumasa?Maekawa Masataka?Aino 《Journal of General Plant Pathology》2004,70(4):207-211
From 1996 to 1997, potassium silicate (SiO2) was tested at 0, 25, 50, and 100mgl–1 in hydroponics to control powdery mildew. Other elements were added in the usual amounts, and the strawberries were cultivated hydroponically in a greenhouse for 4 months (from October to January). The powdery mildew spread in the control plot, but little mildew developed in the plot with 25mgl–1 silicate, and none in plots with more than 50mgl–1 silicate. The suppressive effect lasted for about 4 months on fruits and even longer on leaves. On analysis of mineral content in the leaves, only the silicate content differed markedly between the control and treated plants. Nitrogen, phosphate, potassium, and calcium contents did not differ greatly. The maximum silicate content was about 24 times that of the control, and disease severity decreased significantly when the content was more than 1.5% in the leaves. The hardness of the strawberry leaves, measured by a creep meter, was increased by the silicate treatment. 相似文献
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秦岭山区硅酸盐细菌的分离、筛选以及初步鉴定 总被引:1,自引:0,他引:1
针对秦岭周至县不同生境的土壤进行硅酸盐细菌的分离与筛选,对20株生长较好的硅酸盐细菌进行摇瓶培养,测定其发酵液的水溶性钾含量,挑选出解钾能力较强的菌株,并使用传统生理生化特征试验和Biolog微生物自动鉴定仪两种方法对其进行鉴定.结果表明,QL21为1株解钾能力较强的菌株,解钾率为25.1%,该菌为G+革兰氏阳性,菌体为长杆状,产生椭圆芽孢以及椭圆形肥大荚膜,其生理生化特征与芽孢杆菌很接近,经Biolog微生物自动鉴定仪鉴定为芽孢杆菌. 相似文献
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[目的]研究硅酸盐细菌的解钾作用,为利用该菌生产生物钾肥提供科学依据。[方法]从不同地区土样筛选硅酸盐细菌,选出高效菌株DMS3,并进行生理生化鉴定和16SrDNA的PCR分析,对DMS3菌株进行发酵,用发酵液浇灌绿豆,观察其对绿豆各生长指标的影响。[结果]DMS3菌株16SrDNA大约1500bp,该菌有较高的解钾能力,发酵液中K^+浓度达到1020.646μg/L,用该菌液浇灌绿豆可明显提高株高、根长、鲜重、干重等指标。[结论]硅酸盐细菌在液体培养过程中能够产生某些促进植物生长的物质,同时能提高绿豆的抗旱能力,为该菌肥工业化开发应用奠定了基础。 相似文献