CN106947493B - 一种酸性土壤绿色改良增效剂及其制备方法 - Google Patents
一种酸性土壤绿色改良增效剂及其制备方法 Download PDFInfo
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- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/40—Soil-conditioning materials or soil-stabilising materials containing mixtures of inorganic and organic compounds
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Abstract
本发明属于土壤改良技术领域,具体公开一种酸性土壤绿色改良增效剂及其制备方法。由下述重量百分含量的原材料组成:氧化钙30~50%、氧化镁20~30%、聚环氧琥珀酸或聚环氧琥珀酸钾1~5%、填料15~49%。聚环氧琥珀酸(钾)之前都是用作水处理中的阻垢剂,本发明将其作为土壤改良剂的原材料,尚属首次;本发明中采用的原料氧化钙、氧化镁、聚环氧琥珀酸(钾)和填料对作物、土壤、人类健康均无毒无害,因此其组合而成的土壤改良增效剂为绿色产品;施用本发明土壤调理剂能显著增加0‑20cm耕层土壤PH值、细菌、放线菌的数量,降低0‑20cm耕层土壤容重,提高花生的农艺性状和产量。
Description
技术领域
本发明属于土壤改良技术领域,具体涉及一种酸性土壤绿色改良增效剂及其制备方法。
背景技术
植物正常生长发育有赖于良好的土壤环境。但在自然界中,植物生长的土壤往往存在着各种各样的障碍因素,限制着植物生长。例如,世界陆地表面大面积盐碱土中有高浓度的盐分;酸性土壤中有高浓度的H+,Al3+,Mn2+和Fe2+等;淹水土壤中有过量的还原性物质和Fe2+等;石灰性土壤中缺乏足够的有效磷、铁和锌等。随着化学肥料的连年施用及高产作物的根系向土壤不断释放H+,土壤pH值呈逐年下降趋势,耕层土壤pH值低于5.5的田块逐年增加,导致作物产量低,增施肥料无效,病虫害严重,因此,土壤严重酸化已成为农业生产发展的限制因素。
土壤调理剂(Soil conditioner)是一类主要用于改良土壤性质以便有利于作物生长,而并非是作为主要为作物生长提供所需养分的物质,主要功能包括改善土壤物理、化学及生物性状,并且对保持土壤含水量、改良土壤团粒结构、调节土壤pH、降低土壤盐碱危害以及修复污染土壤等也具有明显作用,同时,很多研究表明,土壤调理剂能促进作物生长发育,提高作物产质量,增强作物抗逆性。近年来,土壤调理剂种类研发越来越多,韩小霞将土壤调理剂分为 4种类型,即有机类、矿物类、高分子类和其他类型。现有土壤调理剂因为常年施用,田间土壤很多已经对其产生了耐药性,已经起不到最初的土壤改良效果了。因此,研究一种新型土壤调理剂是十分必要的。
发明内容
为克服现有技术中存在的不足之处,本发明的目的在于提供一种酸性土壤绿色改良增效剂及其制备方法。
为实现上述目的,本发明采取的技术方案如下:
一种酸性土壤绿色改良增效剂,由下述重量百分含量的原材料组成:
氧化钙30~50%、氧化镁20~30%、聚环氧琥珀酸或聚环氧琥珀酸钾1~5%、填料15~49%。
较好地,所述聚环氧琥珀酸的质量指标为:有效物质含量≥95wt%,并且10质量倍的水稀释液pH为7.5~11.0,降解率≥60%;所述聚环氧琥珀酸钾的质量指标为:K2O含量占5~25wt%,有效物质含量≥95wt%,并且10质量倍的水稀释液pH为7.5~11.0,降解率≥60%。
较好地,所述填料为膨润土。
本发明提供了两种制备方法,具体如下:
制备方法1:按比例称取原材料,混合,然后破碎筛分至物料颗粒粒度≤1mm,获得成品;最后将成品计量、包装,即获得产品。
制备方法2:按比例称取原材料,混合,然后依次历经破碎、造粒、烘干、包装,即获得产品。进一步,烘干后,再经冷却、筛分至2.5mm≤物料颗粒粒度≤4.5mm,获得成品;最后将成品计量、包装,即获得产品。
氧化钙(calcium oxide),是一种无机化合物,它的化学式是CaO,俗名生石灰。物理性质是表面白色粉末,具有吸湿性,生石灰遇水反应生成氢氧化钙,反应方程式:CaO+H2O =Ca(OH)2,氢氧化钙是一种二元中强碱,农业上用氢氧化钙与硫酸铜溶液等配制具有杀菌作用的波尔多液作为农药,也可将适量的熟石灰加入土壤,中和酸性,改良酸性土壤,改善农作物生存环境,同时,向土壤释放Ca2+,供植物吸收利用。氧化镁(化学式:MgO)是镁的氧化物,常温下为一种白色粉末,MgO+H2O→Mg(OH)2,吸湿性较弱,施入土壤后,能提高土壤的pH值,同时,向土壤释放Mg2+,供植物吸收利用。聚环氧琥珀钾是聚环氧琥珀酸的钾盐,呈碱性;聚环氧琥珀酸(PESA)是一种无氮、非磷有机化合物,其活性基团对水中金属等阳离子具有较强的螯合能力,是一种绿色水处理化学品;聚环氧琥珀钾在土壤中钾离子的交换作用,不仅能螯合Al3+,Mn2+和Fe2+等阳离子,还能增加植物必需的中微量营养元素的有效性,促进植物生长发育。
有益效果:
1、聚环氧琥珀酸(钾)之前都是用作水处理中的阻垢剂,本发明将其作为土壤改良剂的原材料,尚属首次;
2、本发明中采用的原料氧化钙、氧化镁、聚环氧琥珀酸(钾)和填料对作物、土壤、人类健康均无毒无害,因此其组合而成的土壤改良增效剂为绿色产品;
3、施用本发明土壤调理剂能显著增加0-20cm耕层土壤PH值、细菌、放线菌的数量,降低0-20cm耕层土壤容重,提高花生的农艺性状和产量。
附图说明
图1:本发明酸性土壤绿色改良增效剂的生产流程之一。
图2:本发明酸性土壤绿色改良增效剂的生产流程之二。
图3:不同处理对花生收获期0-20cm耕层土壤容重的影响(g/cm3)。
具体实施方式
下面结合具体实施例对本发明作进一步详细说明。
以下实施例中的聚环氧琥珀钾的质量指标为:K2O含量:5wt%,10质量倍的水稀释液pH:8.5,有效物质含量95wt%,降解率60%。
实施例1
一种酸性土壤绿色改良增效剂,由下述重量百分含量的原材料组成:氧化钙30%、氧化镁20%、聚环氧琥珀钾1%、膨润土49%。
制备方法,流程图如图1所示:按比例称取原材料,混合,然后破碎筛分至物料颗粒粒度≤1mm,获得成品;最后将成品计量、包装,即获得产品。
实施例2
一种酸性土壤绿色改良增效剂,由下述重量百分含量的原材料组成:氧化钙45%、氧化镁25%、聚环氧琥珀钾3%、膨润土27%。
制备方法,流程图如图2所示:按比例称取原材料,混合,然后依次历经破碎、造粒、烘干、包装,即获得产品。
实施例3
一种酸性土壤绿色改良增效剂,由下述重量百分含量的原材料组成:氧化钙50%、氧化镁30%、聚环氧琥珀钾5%、膨润土15%。
制备方法,流程图如图2所示:按比例称取原材料,混合,然后依次历经破碎、造粒、烘干、冷却、筛分至2.5mm≤物料颗粒粒度≤4.5mm,获得成品;最后将成品计量、包装,即获得产品。
应用例
1、材料与方法
1.1 试验地点和供试花生品种
试验于2016年6月-10月安排在河南省正阳县兰青乡大余村花生试验田。试验田土壤为砂姜黑土,质地粘壤,地势平坦,土壤肥力均匀,排灌条件良好。0-20cm耕层土壤基础地力:有机质13.3g/kg、全氮0.8g/kg、速效氮72.6mg/kg、速效磷13.8mg/kg、速效钾98.3mg/kg、有效锌1.31mg/kg、PH值5.10,0-20cm耕层土壤容重1.42g/cm3。
供试花生品种为驻花1号。
1.2 试验设计
试验共设4个处理,T1,对照;T2,土壤调理剂A(实施例1产品),施用量为600 kg/hm2;T3,土壤调理剂B(实施例2产品),施用量为600 kg/hm2;T4,土壤调理剂C(实施例3产品),施用量为600 kg/hm2。
氮磷钾的施用量分别为N 120 kg/hm2,P2O590 kg/hm2、K2O 120 kg/hm2,肥料品种为尿素、过磷酸钙、氯化钾,肥料全部作基肥施用,肥料撒施起垄后,种植花生。试验小区面积为 15m2,重复 3 次,随机排列。种植方式为起垄种植,种植密度为18万穴/hm2,每穴播种2粒。其它田间管理按照一般丰产大田进行管理。
1.3 田间调查测定与样品采集
1.3.1 土壤样品采集与测定
整地施肥前采集基础土壤(0-20cm)样品1kg,测定基础地力。
花生苗期、开花期、结荚期、饱果期、收获后,每个处理取0-20cm耕层土壤,按照土水比为1:10的质量比,测定土壤溶液的pH值。
花生花针期,每个处理取0-20cm耕层土壤,采用平板计数法测定土壤微生物。
花生收获期,每个处理采用环刀法测定0-20cm耕层土壤的容重。
1.3.2 收获与计产
花生收获时,每个处理分别取4m2进行收获、晾晒、称重计产。
1.3.3 其他事项
记载花生播种期、出苗时间、始花时间和收获时间。
2 结果与分析
2.1 不同处理对花生不同生育期耕层土壤PH值的影响
从表1可以看出,随着花生生育期的推移,不同处理0-20cm耕层土壤PH值均呈增加趋势;在花生不同生育期,0-20cm耕层土壤PH值大小顺序均为T4>T3>T2>T1,表明随着氧化钙、氧化镁、聚环氧琥珀钾在土壤调理剂中含量的增加,0-20cm耕层土壤PH值呈增高趋势。
2.2不同处理对花生花针期0-20cm耕层土壤微生物的影响
从表2可以看出,土壤中细菌、放线菌数量的多少能衡量土壤生物多样性的丰富程度,是土壤肥力的重要指标。T2、T3、T4处理的0-20cm耕层土壤中细菌、放线菌数量显著高于不施土壤调理剂T1的,施用土壤调理剂能增加0-20cm耕层土壤中细菌、放线菌的数量;T2、T3、T4处理的土壤中真菌数量显著低于T1的,表明施用土壤调理剂能显著降低土壤中真菌的数量,而土壤中真菌数量的增加是土壤退化的标志,因此,施用土壤调理剂能提高土壤的肥力。随着氧化钙、氧化镁、聚环氧琥珀钾在土壤调理剂中含量的增加,0-20cm耕层土壤真菌数量呈降低趋势,细菌、放线菌数量呈抛物线变化趋势,T3处理的0-20cm耕层土壤细菌、放线菌数量最高,表明在土壤调理剂中氧化钙、氧化镁、聚环氧琥珀钾含量过高,也不利于细菌、放线菌的增殖。
2.3 不同处理对花生收获期0-20cm耕层土壤容重的影响
从图3可知,花生收获期,T1、T2 、T3、T4处理0-20cm耕层土壤容重分别为1.46 g/cm3、1.40 g/cm3、1.34 g/cm3、1.31 g/cm3, T2、T3、T4处理的0-20cm耕层土壤容重显著低于不施土壤调理剂T1的,表明施用土壤调理剂能显著降低0-20cm耕层土壤容重;0-20cm耕层土壤容重随着氧化钙、氧化镁、聚环氧琥珀钾在土壤调理剂中含量的增加呈降低趋势。
2.4 不同处理对花生农艺性状及产量的影响
从表3可以看出,T2、T3、T4处理的主茎高、侧枝长、分枝数和产量均比T1的高或多,表明施用土壤调理剂能显著增加花生主茎高、侧枝长、分枝数和产量;随着氧化钙、氧化镁、聚环氧琥珀钾在土壤调理剂中含量的增加,主茎高、侧枝长、分枝数和产量呈增加趋势,其中,T4的产量最高,为5166.8 kg/hm2,分别比T1、T2、T3的产量增加25.9%、8.1%、1.3%。
3 小结
施用土壤调理剂能显著增加0-20cm耕层土壤PH值、细菌、放线菌的数量,降低0-20cm耕层土壤容重,提高花生的农艺性状和产量,在N、P2O5、K2O施用量分别为 120 kg/hm2、90 kg/hm2、120 kg/hm2,施用土壤调理剂600 kg/hm2,其中氧化钙50%、氧化镁30%、聚环氧琥珀钾5%、填料15%时,产量最高,为5166.8 kg/hm2,与施用土壤调理剂600 kg/hm2,其中氧化钙45%、氧化镁25%、聚环氧琥珀钾3%、填料27%时的产量几乎一样,为5100.1 kg/hm2。
Claims (4)
1.一种酸性土壤绿色改良增效剂,其特征在于,由下述重量百分含量的原材料组成:氧化钙30~50%、氧化镁20~30%、聚环氧琥珀酸钾1~5%、膨润土15~49%;
所述聚环氧琥珀酸钾的质量指标为:K2O含量占5~25wt%,有效物质含量≥
95wt%,并且10质量倍的水稀释液pH为7.5~11.0,降解率≥60%。
2.一种如权利要求1所述酸性土壤绿色改良增效剂的制备方法,其特征在于:按比例称取原材料,混合,然后破碎筛分至物料颗粒粒度≤1mm,获得成品;最后将成品计量、包装,即获得产品。
3.一种如权利要求1所述酸性土壤绿色改良增效剂的制备方法,其特征在于:按比例称取原材料,混合,然后依次历经破碎、造粒、烘干、包装,即获得产品。
4.如权利要求3所述制备方法,其特征在于:烘干后,再经冷却、筛分至2.5mm≤物料颗粒粒度≤4.5mm,获得成品;最后将成品计量、包装,即获得产品。
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