CN112218520A - 土壤的改良方法 - Google Patents
土壤的改良方法 Download PDFInfo
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- CN112218520A CN112218520A CN201980035557.XA CN201980035557A CN112218520A CN 112218520 A CN112218520 A CN 112218520A CN 201980035557 A CN201980035557 A CN 201980035557A CN 112218520 A CN112218520 A CN 112218520A
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Abstract
本发明的课题在于,提供通过简便的操作而能够改良土壤的土壤的改良方法。本发明的土壤的改良方法是对土壤施用纳米气泡水的土壤的改良方法。
Description
技术领域
本发明涉及土壤的改良方法。
背景技术
氮、磷酸和钾也被称为肥料成分的三要素,对于植物体的生长而言是不可或缺的。
已知这种肥料成分在溶解于水的状态下被植物体吸收,但已知因溶解于水而向植物体无法吸收的区域流出这一问题。
针对这种问题,例如专利文献1中记载了一种土壤改良方法,其中,将作为对于植物培育而言有用的营养成分的至少1种发酵有机物附着于沸石而得的土壤改良材料施用于混有肥料的土中,或者与肥料一同施用于土中([权利要求1][权利要求12])。
现有技术文献
专利文献
专利文献1:日本特开2005-075848号公报
发明内容
发明要解决的问题
本发明人针对专利文献1中记载的土壤改良方法进行了研究,结果明确了:使发酵有机物附着于沸石的操作是复杂的。
因而,本发明的课题在于,提供通过简便的操作而能够改良土壤的土壤的改良方法。
用于解决问题的方案
本发明人为了实现上述课题而进行深入研究的结果发现:通过对土壤使用纳米气泡水,土壤得以改良,从而完成了本发明。
即,本发明人发现:通过以下的构成能够实现上述课题。
[1]一种土壤的改良方法,其中,对土壤施用纳米气泡水。
[2]根据[1]所述的土壤的改良方法,其中,实施使用了上述纳米气泡水的喷洒。
[3]根据[1]或[2]所述的土壤的改良方法,其中,上述纳米气泡水所含的气泡的众数粒径为10~500nm。
[4]根据[1]~[3]中任一项所述的土壤的改良方法,其中,上述纳米气泡水所含的气泡包含选自由氧、氮、二氧化碳和臭氧组成的组中的至少1种气体。
[5]根据[1]~[4]中任一项所述的土壤的改良方法,其中,上述纳米气泡水具有1×108~1×1010个/mL的气泡。
[6]根据[1]~[5]中任一项所述的土壤的改良方法,其中,上述土壤为植物体的土耕栽培或养液土耕栽培所使用的土壤。
[7]根据[6]所述的土壤的改良方法,其中,上述植物体为花卉类或叶茎菜类。
[8]根据[6]或[7]所述的土壤的改良方法,其中,上述植物体为六出花科植物或小松菜。
发明的效果
根据本发明,可提供通过简便的操作而能够改良土壤的土壤的改良方法。
附图说明
图1为示出纳米气泡生成装置的一例的示意图。
具体实施方式
以下,针对本发明进行详细说明。
以下记载的构成要素的说明有时是基于本发明的代表性实施方式而进行的,但本发明不限定于这种实施方式。
需要说明的是,本说明书中,使用“~”而示出的数值范围是指包含“~”的前后记载的数值作为下限值和上限值的范围。
本发明的土壤的改良方法(以下也简写为“本发明的土壤改良方法”)是对土壤施用纳米气泡水的土壤的改良方法。
本发明中,如上所述,通过对土壤施用纳米气泡水而能够实现土壤的改良。
其详情尚不明确,但本发明人推测如下。
即,如后述实施例的试验1所示可知:在对土壤施用纳米气泡水的试验区中,即使与对土壤使用井水并进一步进行追肥的常规区相比,硝酸态氮的有效量也增加,土壤得以改良。
考虑这是因为:因纳米气泡水而使土壤中的微生物的活动或数量增加,容易进行从基肥向有效态的变态。
以下,针对本发明的土壤改良方法中使用的纳米气泡水和任选成分进行详述。
〔纳米气泡水〕
本发明的土壤改良方法中使用的纳米气泡水是包含直径小于1μm的气泡的水,是混入有上述气泡的水。需要说明的是,“混入有上述气泡的水”是指:不包括因用于生成纳米气泡水的水(例如包含杂质的井水)等而不可避免地包含的上述气泡的水的含义。
此处,纳米气泡水所包含的气泡的直径(粒径)、以及后述气泡的众数粒径和气泡的个数是使用纳米颗粒追踪分析法测定水中的气泡的布朗运动移动速度而得的值,本说明书中,采用通过纳米颗粒分析系统NanoSight系列(NanoSight公司制)而测得的数值。
需要说明的是,利用纳米颗粒分析系统NanoSight系列(NanoSight公司制),能够计测颗粒的布朗运动速度,并由其速度算出直径(粒径),众数粒径可通过由存在的纳米颗粒的粒径分布以众数径的形式来确认。
本发明中,从进一步改良土壤的理由出发,上述纳米气泡水所含的气泡的众数粒径优选为10~500nm、更优选为30~300nm、进一步优选为70~130nm。
构成上述纳米气泡水所含的气泡的气体没有特别限定,从长时间残留在水中的观点出发,优选为除氢之外的气体,具体而言,可列举出例如空气、氧、氮、氟、二氧化碳和臭氧等。
这些之中,从进一步改良土壤的理由出发,优选包含选自由氧、氮、二氧化碳和臭氧组成的组中的至少1种气体,尤其是,从气泡能够更长时间残留的理由出发,更优选包含氧。
此处,包含氧是指以比空气中的氧浓度更高的浓度来包含。氮和二氧化碳也相同。需要说明的是,针对氧的浓度,优选为气泡中的30体积%以上、更优选超过50体积%且为100体积%以下。
从进一步改良土壤的理由出发,上述纳米气泡水优选具有1×108~1×1010个/mL的气泡,尤其是,从气泡生成时间与气泡残留性的平衡变得良好的理由出发,更优选具有多于1×108个/mL且少于1×1010个/mL的气泡,从进一步改良土壤的理由出发,进一步优选具有5×108~5×109个/mL的气泡。
作为上述纳米气泡水的生成方法,可列举出例如静态混合器法、文丘里法、气穴法、蒸气聚集法、超声波法、涡流法、加压溶解法和微细孔法等。
此处,本发明的土壤改良方法可以具有在施用上述纳米气泡水之前先生成上述纳米气泡水的生成工序。即,本发明的土壤改良方法可以是具有如下工序的防治方法:例如,将水从储水罐、井或农业用水等水源取入至纳米气泡生成装置中,生成纳米气泡水的生成工序;以及施用所生成的纳米气泡水的施用工序。需要说明的是,作为将来自水源的水取入至纳米气泡生成装置的方法,可列举出例如下述方法:使用桶或泵等将从水源打来的水供给至纳米气泡生成装置的方法;以及将在水源与纳米气泡生成装置之间铺设的流路连接于纳米气泡生成装置,并将水从流路直接送入纳米气泡生成装置的方法等。
此外,作为上述纳米气泡水的生成方法,优选为使用了不会主动产生自由基的装置的生成方法,具体而言,可列举出例如使用日本特开2018-15715号公报第[0080]~[0100]段中记载的纳米气泡生成装置来生成的方法。需要说明的是,将上述内容援引至本说明书中。
作为不主动产生自由基的其它纳米气泡生成装置,可列举出例如下述微细气泡生成装置,其特征在于,其具有:将水喷出的液体喷出机;将气体加压并使其混入从上述液体喷出机喷出的水的气体混入机;以及通过将混入有气体的水通入内部而在水中生成微细气泡的微细气泡生成器,上述气体混入机将气体加压并使其混入至在上述液体喷出机与上述微细气泡生成器之间以加压状态朝向上述微细气泡生成器流动的液体。具体而言,可列举出使用图1所示的纳米气泡生成装置而生成的方法。
此处,图1所示的纳米气泡生成装置10在其内部具备液体喷出机30、气体混入机40和纳米气泡生成喷嘴50。
此外,液体喷出机30由泵构成,其取入纳米气泡水的原水(例如井水)并喷出。气体混入机40具有封入有压缩气体的容器41和大致筒状的气体混入机主体42,在将从液体喷出机30中喷出的水流入至气体混入机主体42内的同时,向气体混入机主体42内导入容器41内的压缩气体。由此,在气体混入机主体42内生成气体混入水。
此外,纳米气泡生成喷嘴50通过在其内部流通气体混入水而按照加压溶解的原理使气体混入水中产生纳米气泡,作为其结构,可以采用与日本特开2018-15715号公报中记载的纳米气泡生成喷嘴相同的结构。在纳米气泡生成喷嘴50内生成的纳米气泡水从纳米气泡生成喷嘴50的前端喷出后,从纳米气泡生成装置10流出,在未图示的流路内流通并向规定的利用部位供水。
如上那样,在纳米气泡生成装置10中,气体混入机40使压缩气体混入至在液体喷出机30与纳米气泡生成喷嘴50之间以加压状态朝向纳米气泡生成喷嘴50流通的水(原水)中。由此,能够避免在液体喷出机30的吸入侧(抽吸侧)使气体混入水时产生的气穴等不良情况。此外,气体在加压(压缩)的状态下混入至水中,因此,能够使气体抵抗气体混入部位的水压并混入。因此,即使在气体混入部位不特别产生负压,也能够使气体适当地混入至水中。
进而,在液体喷出机30的抽吸侧连入从井或自来水等水源供给的水的流路,在该流路中,从液体喷出机30的上游侧向液体喷出机30流入的水压(即抽吸侧的水压)为正压即可。此时,上述构成变得更有意义。即,在液体喷出机30的上游侧的水压(抽吸压力)呈现正压的情况下,在液体喷出机30的下游侧会使气体混入至水中,因此,即使在液体喷出机30的下游侧也能够使气体适当混入至水中的纳米气泡生成装置10的构成变得更显眼。
此外,用于生成上述纳米气泡水的水没有特别限定,可以使用例如雨水、自来水、井水、农业用水和蒸馏水等。
这种水可以是在供于产生纳米气泡水之前先实施了其它处理的水。作为其它处理,可列举出例如pH调整、沉淀、过滤和灭菌(杀菌)等。具体而言,例如使用农业用水时,典型而言,可以使用实施沉淀和过滤中的至少一者后的农业用水。
本发明中,对土壤施用上述纳米气泡水的方式因使用了该土壤的植物体的栽培方法而异,没有特别限定,可列举出例如如下方式:在土耕栽培中对土壤喷洒上述纳米气泡水的方式、在养液土耕栽培(灌水同时施肥栽培)中对土壤供给被上述纳米气泡水稀释的培养液的方式、以及在养液土耕栽培中单独对土壤喷洒(灌水)上述纳米气泡水的方式等。
这些之中,从能够利用更简便的操作来实现土壤改良的理由出发,优选为实施使用了上述纳米气泡水的喷洒的方式。
需要说明的是,作为施用的一个方式的“喷洒”的方法没有特别限定,在栽培方法为土耕栽培的情况下,可列举出例如对植物体整体散布水的方法、对一部分植物体(例如茎或叶等)散布水的方法、以及对种植有植物体的土壤散布水的方法等。此外,在栽培方法为养液土耕栽培的情况下,如上那样可以为基于灌水的喷洒。
<其它成分>
上述纳米气泡水可以进一步包含其它成分。
作为上述其它成分,可列举出例如农药、肥料、表面活性剂、防冻剂、消泡剂、防腐剂、抗氧化剂和增稠剂等。其它成分的种类和含量没有特别限定,可根据目的来选择。
其中,在本发明中,作为上述其它成分,优选在上述纳米气泡水中实质上不含自由基。需要说明的是,“实质上不含自由基”并不是指排除因用于生成上述纳米气泡水的水(例如包含杂质的井水)等而不可避免地包含自由基的含义,而是排除混入因某种操作而生成的自由基的含义。
〔土壤/植物体〕
应用本发明的土壤改良方法的土壤优选用于植物体的土耕栽培或养液土耕栽培。
此外,上述植物体没有特别限定,优选为认为施用肥料来进行栽培的植物体。
作为这种植物体,可列举出例如蔷薇、六出花、仙客来、郁金香、金鱼草、大丽花、菊花、大丁草和兰花等花卉类;
茄科植物(例如茄子、茄瓜、番茄(包含小番茄)、树番茄、辣椒、甜椒、哈瓦那辣椒、青椒、红辣椒和五彩椒等)、五加科植物(例如日本萸叶五加等)、葫芦科植物(例如南瓜、西葫芦、黄瓜、刺角瓜、越瓜、苦瓜、冬瓜、佛手瓜、丝瓜、葫芦、西瓜、哈密瓜和甜瓜等)、锦葵科植物(例如秋葵等)以及蔷薇科植物(例如草莓等)等果蔬类;
圆白菜、洋葱、葱、白菜、菠菜、生菜、西蓝花、小松菜、韭菜、龙须菜、芹菜、茼蒿、花椰菜、大蒜和藠头等叶茎菜类;
萝卜、胡萝卜、牛蒡、芜菁和莲藕等根菜类;
蜜柑、苹果、桃、梨、西洋梨、香蕉、葡萄、樱桃、沙枣、木莓、蓝莓、覆盆子、黑莓、桑、琵琶、无花果、柿、木通、芒果、鳄梨、枣、石榴、鸡蛋果、凤梨、香蕉、番木瓜、杏、梅、李、桃、猕猴桃、木瓜、杨梅、栗子、神秘果、番石榴、杨桃和西印度樱桃等果树类等。
这些之中,从本发明的土壤改良方法的有用性变高的理由出发,优选为花卉类或叶茎菜类,更优选为六出花科植物或小松菜。
实施例
以下,列举出实施例来更详细地说明本发明。以下实施例所示的材料、用量、比例、处理内容和处理步骤等可以在不超脱本发明主旨的范围内适当变更。因此,本发明的范围不受以下所示的实施例的限定性解释。
〔试验1〕
<试验1的内容>
试验在日本千叶县茂原市栽培的六出花的农业棚中根据以下分区来实施。
试验区:在2017年6月~7月的栽种有300株六出花(品种:Caryo Hybrid)的农业大棚中,从栽种起至2018年1月末为止,对于土壤和茎叶手工喷洒地使用通过下述方法而生成的纳米气泡水。需要说明的是,在试验区中,从下述表1所示的基肥状态不进行追肥地加以栽培。
常规区:在2017年6月~7月的栽种有300株六出花(品种:Caryo Hybrid)的其它农业大棚中,从栽种起至2018年1月末为止,对于土壤和茎叶手工喷洒地使用井水,不使用纳米气泡水。需要说明的是,在常规区中,从下述表1所示的基肥状态在2017年10月14日和2018年1月5日以每8株20g的量进行追肥〔氮:磷酸:钾=6:3:3(质量比)〕,加以栽培。
此处,喷洒的频率和量按照常规方法,根据六出花的生长状况和天气等来适当变更,但试验区和常规区以大致相同的方式进行调整。
<纳米气泡水的生成方法>
纳米气泡水通过使用纳米气泡生成装置〔KAKUICHI制作所Aqua Solution事业部(现:Aqua Solution公司)制、100V、10L/min类型〕,通过加压溶解方式使水中产生气泡(纳米气泡)来生成。
需要说明的是,在纳米气泡水的生成用途中使用的水使用了井水,构成气泡的气体使用了氧(工业用氧、浓度:99.5体积%)。
此外,关于使用上述纳米气泡生成装置来产生纳米气泡的条件,在基于纳米颗粒分析系统NanoSight LM10(NanoSight公司制)的分析结果达到以下的条件下进行。
·每1mL水的气泡数:5×108个/mL
·气泡的众数粒径:100nm
<土壤改良的评价>
在试验区和常规区中,针对栽种时的土壤、2017年10月7日的土壤、2017年11月18日的土壤、2017年12月23日的土壤和2018年1月27日的土壤,使用Dr.土壤(土壤养分检测器),按照以下的步骤测定硝酸态氮、磷酸和钙的有效态的量。将结果示于下述表1。
(测定步骤)
(1)采取一部分土壤,对所采取的土壤添加乙酸。
(2)使用滤纸进行过滤,从土壤中回收利用乙酸提取出的提取液。
(3)向所回收的提取液中添加成分鉴别试剂。
(4)使用吸光光度计,由色调来测定含量。
[表1]
由表1所示的结果可知:在试验区中,在2017年10月7日、2017年11月18日、2017年12月23日和2018年1月27日中的任意日期采取的土壤中,硝酸态氮的有效量即使与栽种时的基肥相比也增大,可知土壤得以改良。可认为该效果是因为:若考虑到在常规区中在2017年10月14日和2018年1月5日进行了追肥,则可以说是意外的效果,通过施用纳米气泡水,土壤中的基肥所包含的氨态氮变化成硝酸态氮。
此外,针对磷酸和钙来看也可知:未进行追肥的试验区保持了与进行追肥后的常规区同等程度的含量,土壤得以改良。
〔试验2〕
<试验2的内容>
试验在从2018年8月29日(播种)起至10月8日(收获)为止在日本长野县小诸市栽培的小松菜的农场中根据以下分区来实施。各试验区设定在同一个塑料大棚内。
试验区2-1:在塑料大棚栽培中,每2天进行1次的喷洒使用农业用水,不使用纳米气泡水。
试验区2-2:在塑料大棚栽培中,每2天进行1次的喷洒使用每1mL水的气泡数调整至2×108个/mL的纳米气泡水。
试验区2-3:在塑料大棚栽培中,每2天进行1次的喷洒使用每1mL水的气泡数调整至5×108个/mL的纳米气泡水。
需要说明的是,在各试验区中,分别栽培在设置于塑料大棚内的盆中播种的小松菜各2盆。
此外,喷洒量按照常规方法,根据小松菜的生长状况和天气等来适当变更,但三个试验区之间以大致相同的方式进行调整。
此外,在试验2中,为了验证由1mL纳米气泡水中的气泡数带来的优势性而未主动实施农药的散布。
<纳米气泡水的生成方法>
纳米气泡水通过使用纳米气泡发生装置(Aqua Solution公司制、100V、10L/min类型),并以加压溶解方式在水中产生气泡(纳米气泡)来生成。在纳米气泡水的生成用途中使用的水使用农业用水,构成气泡的气体种类设为氧(工业用氧、浓度:99体积%)。
此外,在使用上述纳米气泡发生装置来产生纳米气泡的条件之中,气泡的尺寸(众数粒径)设为100nm。
此外,每1mL纳米气泡水的气泡数如上所述,在试验区2-2中为2×108个/mL,在试验区2-3中为5×108个/mL。每1mL纳米气泡水的气泡数可通过例如在上述纳米气泡发生装置的下游侧设置纳米气泡水的贮留槽,将贮留槽内的纳米气泡水送回至纳米气泡发生装置并使纳米气泡水在体系内循环,变更其循环时间来调整。
<土壤改良的评价>
在试验区2-1~2-3中,针对播种时(2018年8月29日)的土壤和收获时(2018年10月8日)的土壤,利用与上述试验1相同的步骤,测定硝酸态氮、磷酸和钾的有效态的量。将结果示于下述表2。
需要说明的是,在各试验区中,所栽培的小松菜的生长程度几乎观察不到差异,因此,可以说下述表2中的收获时的数值是未受到各试验区中栽培的小松菜的肥料吸收率的影响的数值。
[表2]
根据表2所示的结果,对土壤施用了纳米气泡水的试验区2-2和试验区2-3若与未对土壤施用纳米气泡水的试验区2-1相比,则可知:硝酸态氮的有效态、磷酸和钾均增加,可知土壤得以改良。
尤其可知:纳米气泡水1mL中的气泡数为5×108个/mL的试验区2-3,不仅与气泡数为2×108个/mL的试验区2-2相比,与播种时的土壤相比钾的含量也增加,土壤进一步得以改良。
综上所述,由试验1和试验2的试验结果明确了基于纳米气泡水的土壤改良效果。
附图标记说明
10 纳米气泡生成装置
30 液体喷出机
40 气体混入机
41 容器
42 气体混入机主体
50 纳米气泡生成喷嘴
Claims (8)
1.一种土壤的改良方法,其中,对土壤施用纳米气泡水。
2.根据权利要求1所述的土壤的改良方法,其中,实施使用了所述纳米气泡水的喷洒。
3.根据权利要求1或2所述的土壤的改良方法,其中,所述纳米气泡水所含的气泡的众数粒径为10~500nm。
4.根据权利要求1~3中任一项所述的土壤的改良方法,其中,所述纳米气泡水所含的气泡包含选自由氧、氮、二氧化碳和臭氧组成的组中的至少1种气体。
5.根据权利要求1~4中任一项所述的土壤的改良方法,其中,所述纳米气泡水具有1×108~1×1010个/mL的气泡。
6.根据权利要求1~5中任一项所述的土壤的改良方法,其中,所述土壤为植物体的土耕栽培或养液土耕栽培所使用的土壤。
7.根据权利要求6所述的土壤的改良方法,其中,所述植物体为花卉类或叶茎菜类。
8.根据权利要求6或7所述的土壤的改良方法,其中,所述植物体为六出花科植物或小松菜。
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AU2019277519A1 (en) | 2020-12-17 |
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US20210212266A1 (en) | 2021-07-15 |
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