柑橘猕猴桃,缺铁叶黄小,问我咋办往下看

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在这段时间里,许多客户联系我们说他们的果树有更多的黄叶,叶子仍然很小。感觉像缺铁。向我们发送图片是缺铁。询问哪些产品可以快速熨烫。你应该选择哪种产品好?

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首先,我们来看看为什么农作物缺铁。

事实上,土壤中的铁含量相当高,一般在3%左右,但土壤中的铁主要以高价铁的形式存在,所以她不溶解,植物可以吸收和利用的有效铁非常小,植物极易缺铁。

通常,土壤中的有效铁含量低于2.5 mg/kg作为缺铁阈值。

对铁敏感的作物有高粱,蚕豆,花生,大豆(特别是黑豆),玉米,甜菜,土豆,某些蔬菜和果树。多年生果树如桃子,梨和柑橘比一年生作物更容易缺铁。

在干旱和半干旱的钙质土壤中,碱性土壤和高度通风的土壤缺铁严重。土壤有机质含量太低,有机质含量低,铁的利用率降低。土壤中过量的磷,锰或锌可能导致铁缺乏,施肥不合理,特别是施磷肥过多,可能导致缺铁。在沙质土壤中,有效铁含量低,作物吸收不足。

其次,您如何判断作物中缺铁?

由于铁很难在植物中移动,一旦缺乏,植物通常会带头在幼叶中出现萎黄的迹象。缺铁的典型症状是中叶和上部叶片褪绿,通常从静脉褪绿的时候开始,静脉仍然可以保持绿色,随着缺铁的增加,叶片逐渐变白,静脉变黄,当严重缺铁时,叶子上会出现棕色叶子。斑点和组织坏死并导致叶片死亡。

植物缺铁症状

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停了下来,卷须很大,叶子似乎在燃烧;果实结实率低,有时花蕾全部脱落,果实小。

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弱。在严重的情况下,幼叶和老叶都变白,中脉是常绿,叶很容易脱落。

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猕猴桃缺铁:叶肉变黄,静脉保持绿色,导致叶片呈绿色和网状。当铁缺乏严重时,新芽的顶部已经死亡;果实变黄,果实清淡无味。

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百香果是缺铁的:新叶子呈黄色,叶子又小又薄,果实变小,质量差。

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草莓缺铁:早期新叶和静脉之间萎黄,当有中度缺铁时会有暂时的绿色恢复。当铁缺乏严重时,新生的小叶和新的成熟小叶将变白或变黄,叶片坏死。叶子边缘的静脉之间的褐变和坏死。

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西瓜铁缺乏:当初始或缺铁不严重时,顶部新的采叶者是褪绿色,淡绿色或淡黄色,并且静脉保持绿色。随着时间的推移,或严重的铁缺乏,静脉变绿或消失,整个叶子是黄色或黄白色。

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番茄缺铁:植株顶芽和新叶常呈黄白色,沿叶脉的叶片保持绿色,叶片变薄,叶片底部出现黄色斑点,一般无坏死和褐变。

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谷物,老叶子绿色。在严重的情况下,整个新叶褪绿,发白,褪绿部分颜色均匀,一般不会出现坏死斑点。

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症状越多,症状就越接近新叶的黄化。植物生长不良,生长延迟甚至没有前进,老叶子常常保持绿色。

三,铁元素的作用

如果需要铁来补充铁,那么我们需要了解铁在作物中的作用。

1. Iron is an essential element of crop photosynthesis, and iron deficiency chlorophyll cannot form. Iron fertilizer has obvious effects on the prevention of chlorosis of fruit trees.

2. The content of iron in plants is about three thousandths of dry weight. Iron is mainly concentrated in the chloroplast.

3. Iron participates in the formation of chlorophyll. However, chlorophyll does not contain iron, and the mechanism by which iron participates in chlorophyll formation is still unclear.

4. Green leaves are often iron-deficient. However, sometimes the green iron leaves have as much iron content as the green leaves, but iron is in an inactive state.

5. Iron is an important constituent of the enzymes of aerobic respiration of plants. Therefore, iron participates in respiration and is an important substance of plant energy metabolism. Iron deficiency affects plant physiological activity and affects nutrient absorption.

6. Iron is a constituent of ferredoxin, which is involved in electron transfer.

7. Biological nitrogen-fixing enzymes contain iron, which plays an important role in biological nitrogen fixation.

Fourth, the classification and selection of iron fertilizer

After the crop is deficient in iron, the effect of using agronomic and biotechnology to solve the iron deficiency of plants is not very obvious. The application of iron fertilizer is the most effective method to correct the iron deficiency of plants. Currently used iron fertilizers include the following:

Ferrous sulfate

Main properties: blue-green or green monoclinic crystal, soluble in water.

Application method: It can be used as base fertilizer, seed fertilizer, top dressing and foliar spray.

Main features: poor mixing when sprayed with leaves, easy to burn leaves; poorly applied on calcareous soil with high pH, it will precipitate quickly and transform into insoluble iron compounds.

xx当将二价铁应用于土壤时,其中的一些会迅速氧化成不溶的高价铁并失效。为了避免铁质固定在土壤中,可以混合并浓缩5-10千克硫酸亚铁和200千克有机肥料。在树的根部,它可以更好地克服果树的缺铁萎黄病。另外,可以增加硫酸亚铁的量以促进土壤的局部酸化,增加水溶性铁的含量,喷雾可以直接避免铁固定到土壤中。对于果树,固体或液体硫酸亚铁也可用于注入或注入树干。

铁木质素磺酸盐

主要性能:棕色粉末

申请方法:叶面施用

主要特点:土壤和营养液稳定性低;它不适合使用;它具有润湿性,吸附性和分散性,喷洒在叶面上时不需要添加活性剂。

铁腐败

主要特性:深棕色颗粒

施用方法:可作为基肥施用

主要特点:持久效果;可用于改善石灰性土壤上植物的铁营养。

螯合铁肥

螯合物和铁是常用的常用铁肥制剂。它们通常源自有机酸中的三价铁离子的隔离,其对铁和EDTA,DTPA,HEDTA,EDDHA具有高亲和力。 EDDHMA等。

EDTA铁钠,EDTA铁铵

主要性能:前者为淡黄色至黄棕色粉末,易溶于水;后者有粉末,也有深棕红色液体产品。

申请方法:叶面施用

主要特点:稳定性差,一般不用于石灰质土壤;有一定的污染。

EDDHA螯合铁

主要性质:深红色和黑色颗粒,易溶于水。

施用方法:主要用于叶面喷施,也可作基肥,种肥和追肥。

Main features: higher stability than EDTA; good mixability; environmentally friendly.

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Since iron is quickly converted into insoluble compounds in calcareous soils, iron fertilizers should not be applied directly to the soil.

Shi or acupoints. Some synthetic complex irons are very stable, and soils, especially alkaline soils, have a significant effect on iron supplementation. Foliar application of iron fertilizer also has the disadvantage of easy oxidation, and the mobility of iron in plants is small. Therefore, it is best to use iron fertilizer in the chelated state and spray it several times to effectively prevent iron deficiency.

In summary, it is recommended to choose iron humate when applying iron fertilizer to the soil, and it is recommended to choose EDDHA chelated iron when spraying on the foliar surface. Iron fertilizer can not be applied too much, too much will cause iron poisoning. Foliar application should be applied in small amounts.

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