CN117069546A - 一种肥料增效剂及其应用 - Google Patents
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- LXKCHCXZBPLTAE-UHFFFAOYSA-N 3,4-dimethyl-1H-pyrazole phosphate Chemical compound OP(O)(O)=O.CC1=CNN=C1C LXKCHCXZBPLTAE-UHFFFAOYSA-N 0.000 claims abstract description 7
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Classifications
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/90—Mixtures of one or more fertilisers with additives not having a specially fertilising activity for affecting the nitrification of ammonium compounds or urea in the soil
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C9/00—Fertilisers containing urea or urea compounds
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/40—Mixtures of one or more fertilisers with additives not having a specially fertilising activity for affecting fertiliser dosage or release rate; for affecting solubility
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/80—Soil conditioners
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- Soil Sciences (AREA)
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Abstract
本发明公开了一种肥料增效剂及其应用。所述肥料增效剂为3,4‑二甲基吡唑磷酸盐与甲硫氨酸的混合物,3,4‑二甲基吡唑磷酸盐与甲硫氨酸的质量比为1:0.8~1.5。本发明还提供了一种氮肥,由尿素和肥料增效剂组成,肥料增效剂的质量含量为0.8%~1.2%。本发明提供的肥料增效剂能够减少N2O累计排放量,抑制NH4 +‑N向NO3 ‑‑N的转化,抑制土壤的硝化作用。本发明肥料增效剂由氨基酸和硝化抑制剂组成,能够有效促进作物对营养元素的吸收和利用,促进作物的生长。同时还可以提高氮肥利用率,减少环境污染。本发明肥料增效剂在使用过程中具有绿色、高效、无残留、环境友好的优点。
Description
技术领域
本发明涉及一种肥料增效剂及其应用,属于土壤改良技术领域。
背景技术
农业中氮肥的大规模投入增加了世界范围内的作物产量,实现了全球农业生产与人口的快速增长,但盲目追求产量导致的氮肥不合理施用造成了活性氮向环境中的大量排放,导致了众多环境问题。尿素肥料具有许多优良特性,是我国肥料市场上最重要的固体氮肥,在农业生产中广泛应用。然而,氮肥进入土壤中后会经过硝化作用和反硝化作用产生氧化亚氮(N2O),当N2O进入大气中后不仅会破坏臭氧层,造成温室效应,还会增加人类患皮肤癌的机率。
目前,有效抑制土壤N2O排放的措施就是使用硝化抑制剂,其中,农业生产常用的有3,4-二甲基磷酸盐(DMPP)、双氰胺(Dicyandiamide,DCD)等。但是DCD的施用存在一些缺点导致其应用效果欠佳,不及吡唑类化合物。DCD的施用量较高,15~30kg ha-1才能有效发挥抑制作用;DCD极易溶于水,在土壤中具有很强的移动性,当遭遇到强降雨天气或是白水能力差的土壤中时,DCD易随水淋失,并且容易与铵态氮(NH4 +)发生空间上的分离从而降低其抑制效果;反复施用会加快其降解速率,缩短半衰期。另外,有研究表明施用DCD会对作物有一定的毒害作用。而DMPP相对于DCD而言效果较好,毒性较低,但其作用效果不稳定,物质结构容易遭到破坏,且对于作物而言具有一定的低毒害作用。
氨基酸是低分子量的氮化合物,易于在土壤中吸收和转化。蛋氨酸,又叫做甲硫氨酸,是植物生长的必需氨基酸,其对作物产生以下作用:(1)参与作物激素乙烯的合成。乙烯作为作物生长发育中重要的激素调节物质,在作物生长周期的多个阶段发挥重要作用,乙烯的合成前体物质是蛋氨酸,首先蛋氨酸在腺苷蛋氨酸合成酶氨基环丙烷羧酸(ACC)合成酶和ACC氧化酶(ACO)的作用下生成乙烯,进而促进细胞扩大及有机物质的转化,促进果实成熟,还会促进细胞壁降解酶的合成,迫使叶片、花或果实机械地脱落,提高作物抗旱性。(2)参与多胺类物质的合成。多胺是作物的一种生长调节物质,参与作物的生长发育、性别分化,果实成熟与衰老以及适应逆境等重要生理过程,乙烯和多胺合成用共同的前体物质-蛋氨酸,多胺的合成能与乙烯的合成竞争合成前体,因此多胺能够通过抑制乙烯合成而延缓衰老,在膜水平上,多胺能够调节膜的物理化学性质,稳定膜上的分子组成,清除活性氧自由基,起到抵抗不良环境的作用。(3)提高作物品质和抗逆性。蛋氨酸是含硫氨基酸,缺硫会阻碍蛋白质的合成,蛋氨酸是蛋白质合成的重要起始物质,显著影响作物品质。同时,蛋氨酸能够通过转硫途径,形成谷胱甘肽和硫酸盐等抗氧化代谢物,提高作物抵抗不良环境的能力。另外,蛋氨酸能够改变根基土壤细菌群落组成,防止病菌对根系的侵害,提高作物抗逆性。
发明内容
本发明的目的是提供一种肥料增效剂,以解决肥料利用率低下,污染环境,现有硝化抑制剂效果不稳定等问题。
本发明肥料增效剂还能够减少肥料中有效成分的流失,减少对作物的毒害,提高作物的品质和抗逆能力。
本发明提供的肥料增效剂,为3,4-二甲基吡唑磷酸盐与甲硫氨酸的混合物。
其中,所述3,4-二甲基吡唑磷酸盐与甲硫氨酸的质量比为1:0.8~1.5,优选为1:1。
本发明提供的肥料增效剂能够抑制氮肥(如尿素)中铵态氮向硝态氮转化。
在所述肥料增效剂的基础上,本发明还提供了一种氮肥,由尿素和所述硝化抑制剂组成;
所述氮肥中,所述肥料增效剂的质量含量为0.8%~1.2%,优选为1%。
本发明提供的肥料增效剂能够减少N2O累计排放量,抑制NH4 +-N向NO3 --N的转化,抑制土壤的硝化作用。
本发明具有如下有益技术效果:
1、本发明肥料增效剂由氨基酸和硝化抑制剂组成,能够有效促进作物对营养元素的吸收和利用,促进作物的生长。同时还可以提高氮肥利用率,减少环境污染。
2、本发明肥料增效剂在使用过程中具有绿色、高效、无残留、环境友好的优点。
附图说明
图1为本发明不同处理下N2O排放通量。
图2为本发明不同处理下N2O累计排放量。
图3为本发明不同处理下NH4 +-N含量变化。
图4为本发明不同处理下NO3 --N含量变化。
具体实施方式
下述实施例中所使用的实验方法如无特殊说明,均为常规方法。
下述实施例中所用的材料、试剂等,如无特殊说明,均可从商业途径得到。
按照表1配制不同氮肥(为质量百分含量)。
表1不同组成的氮肥
CK | 对照 |
T1 | 尿素 |
T2 | 99%尿素+1%DMPP |
T3 | 99%尿素+1%甲硫氨酸 |
T4 | 99%尿素+0.5%DMPP+0.5%甲硫氨酸 |
T5 | 60%尿素+40%甲硫氨酸 |
T6 | 60%尿素+40%甲硫氨酸+1%DMPP |
T7 | 99%甲硫氨酸+1%DMPP |
对表1中各种氮肥进行下述测试:
N2O排放通量、N2O排放通量、NH4+-N含量变化、NO3 --N含量变化,测试方法如下:
壤培养实验:
培养所用土壤来自中国农业大学曲周实验基地,将土壤过筛、风干后装进培养瓶中,每个培养瓶中添加50g土壤。均匀施加5.36ml去离子水至40%WHC进行预培养三天。之后根据不同处理配制溶液,添加到土壤中至水分含量为60%WHC。试验处理如表1所示,每个处理设置三个重复。在培养过程中,每隔2天补加水分一次并通风,以便维持土壤水分恒定并保持培养瓶好氧条件。分别于培养的第0、1、3、7、10、14、21、28天进行破坏性取土样,采集后的土壤样品立即完成土壤无机氮的浸提。
气体采集前15min将培养瓶打开,使其与周围环境空气混合。取样时,将瓶口密闭,用30ml注射器抽取培养瓶内气体30ml后,隔1小时后再抽取第二针的气体,一共抽取4针。气体抽取后注入12ml顶空瓶,在24小时内测定。N2O浓度采用气相色谱法(Agilent 6890,美国)测定,测定完后运用色谱软件自动积分计算出峰面积,再换算出N2O浓度。
土壤无机氮含量的测定方法参照中华人民共和国国家环境保护标准《土壤氨氮、亚硝酸盐氮、硝酸盐氮的测定氯化钾溶液提取-分光光度法》(HJ 634-2012)。土壤溶液的浸提:称取10g土壤鲜样,放入100mL离心管中,加入50mL浓度为1molL-1氯化钾(KCl)溶液,在20℃、180r min-1条件下震荡1h;同时空白液为50mL浓度为1mol L-1的KCl溶液。震荡后的溶液经3000r min-1的条件下离心分离10min后取上清液移至100mL比色管中,待测。
其中,不同处理下N2O排放通量如图1所示,可以看出,T2、T3、T4处理添加的抑制剂均有显著的效果,明显降低N2O的排放;除此之外,T3、T4两种处理下的排放量在第1天,第3天,第7天的排放量低于CK。
其中,不同处理下N2O累计排放量如图2所示,可以看出,T2、T3、T4三种处理之间均有显著性差异,并且排放量都低于T1,表明对于N2O排放的抑制效果T4>T3>T2。T4与T1相比可以显著抑制N2O的累计排放量。T4相比于T2处理N2O累计排放量下降14.3%。
其中,不同处理下NH4 +-N含量变化和NO3 --N含量变化如图3和图4所示,可以看出,T4处理的NH4 +-N含量在第3天显著高于T2和T1,说明甲硫氨酸的添加促进了NH4 +-N的生成。而NO3 --N含量的动态变化显示,除CK处理外,T2、T3、T4和T5处理的NO3 --N含量均低于T1,说明其他处理均有硝化抑制作用,通过对比第14天的硝化抑制率发现,本发明肥料增效剂的硝化抑制效果最好。各处理第14天的硝化抑制率如表2所示。
表2不同处理第14天的硝化抑制率
处理 | 硝态氮含量(mg·kg-1) | 硝化抑制率(%) |
T1 | 132.4758978 | - |
T2 | 102.0665628 | 22.96 |
T3 | 39.31952882 | 70.31 |
T4 | 38.62456414 | 70.85 |
T5 | 107.2307214 | 19.06 |
Claims (7)
1.一种肥料增效剂,为3,4-二甲基吡唑磷酸盐与甲硫氨酸的混合物。
2.根据权利要求1所述的肥料增效剂,其特征在于:所述3,4-二甲基吡唑磷酸盐与甲硫氨酸的质量比为1:0.8~1.5。
3.根据权利要求2所述的肥料增效剂,其特征在于:所述3,4-二甲基吡唑磷酸盐与甲硫氨酸的质量比为1:1。
4.权利要求1-3中任一项所述肥料增效剂在抑制氮肥中铵态氮向硝态氮转化中的应用;
所述氮肥为尿素。
5.一种氮肥,由尿素和权利要求1-3中任一项所述肥料增效剂组成。
6.根据权利要求5所述氮肥,其特征在于:所述氮肥中,所述肥料增效剂的质量含量为0.8%~1.2%。
7.根据权利要求6所述氮肥,其特征在于:所述氮肥中,所述肥料增效剂的质量含量为1%。
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