===中文版介绍===

尚呈生物牌黄腐酸钾的作用

1、【改良土壤】 腐肥中的黄腐酸或黄腐酸钾或有机胶体在土壤中形成胶状物质，能把土粒胶结起来，使土壤中水稳性团粒增加，协调土壤的水、肥、气、热状况，对改良过砂过黏等贫瘠土壤效果很好，从而改善作物的生态环境。黄腐酸钾在改良盐碱土壤中，以其含有活性基因较多，盐基交换容量大，能够使土壤的可溶性盐中吸附和阻留较大数量的有害阳离子，降低土壤盐浓度，降低盐碱土的酸碱度。从而改善作物的生态环境。
     2、【提高肥效】 由于黄腐酸钾能吸附交换活化土壤中很多矿质元素，如磷、钙、镁等，使这些元素的有效性大大增加，从而改善了作物的营养条件。在化肥中起到增效剂的作用，而且减轻化肥对土壤理化性状产生的不良影响。

对氮肥增效的作用表现在：减少氮素挥发损失，对尿素的增效作用非常显著，可以使尿素的肥效延长。促进氮的吸收，提高氮肥利用率。对土壤中有机氮矿化速度加快，促使土壤速效氮的含量有所提高。 

对磷肥的增效作用表现在：减少土壤对速效磷的固定，起到解磷的作用。使土壤中难溶性磷转化为有效磷，促进农作物对磷的吸收。提高磷肥有效利用率，促进土壤中有机、无机磷的转化，增加磷在土壤中的移动距离，刺激作物根系发育。

对钾肥增效作用表现在：能减少土壤中对钾的吸收固定，提高速效钾利用率。促进难溶性钾的释放，增加速效钾的数量，能够缓解钾肥对土壤和作物产生的不良影响，对改善作物品质有良好效果。

黄腐酸钾对微量元素也具有明显的增效作用。
     3、【刺激作物生长】 黄腐酸钾中含有多种官能团，作为生理活性物质，对作物的生长发育及体内生理代谢有刺激作用，无机肥料不具有这种特性。黄腐酸钾是水溶性的，它不仅表现在对拌种、蘸根、喷洒等方式对各种作物有明显刺激作用，而且被根系吸收产生刺激作用。促进种子发芽，提高出苗率和成苗率。对作物根系发育有特殊的促进作用，促使幼苗发根快，次生根多，根量增加，根系伸长，使作物吸收水份和养份的能力增加。黄腐酸钾的刺激作用在作物地上部分表现出生长旺盛、株高、杆壮等方面，在前期表现尤为明显。黄腐酸钾通过植物根部吸收，对植物细胞的生理代谢起刺激作用，表现在呼吸强度、光合作用强度的增加。作物叶面喷施黄腐酸钾引起叶片气孔开张度缩小、水份蒸腾降低，作物根系酶活性提高等。
     4、【抗病功能】 土壤有机质含量高，为有益微生物提供一个优良的环境，有益种群逐步发展有为优势种群，抑制有害病菌的生长，再加上植物本身由于土壤条件优良而生长健壮，抗病能力加强，因而大大减少病害，特别是土传病害的发生。
     5、【能增强作物的抗逆性能】 作物生长环境的土壤、水份、养份、温度、光照、空气等诸因素组成了植物的生长条件，黄腐酸钾发挥缓冲作用，降低作物生长的不良影响，具有抗逆性能。能够提高作物抗旱能力，节水能力可以提高30%。节水保墒的效果仅次于地膜覆盖所产生的效果。增强作物抗寒能力，使用黄腐酸钾叶面喷施都可以提高越冬作物的抗御力。具有防御病虫危害的能力，黄腐酸钾对防治病虫害有着独特的效果，与农药配合施用具有抑菌抗病作用（如：与井冈霉素混用有增效作用）。 
     6、【能改善作物品质】 黄腐酸钾对改善作物品质带来的影响将是十分深远的。在蔬菜、瓜果类中，可以提高糖份，增加维生素Ｃ的含量，降低果质酸度。在烟叶、蔬菜等阔叶型作物中，可以提高叶片的质量品质。在粮食作物中，促使作物含有较多的低分子有机营养物质。

===English introduction===

The role of potassium fulvic acid

1.【To improve soil】  

The fulvic acid, potassium fulvic acid or organic colloids in humic acid organic fertilizer form a gelatinous substance in the soil, which can cement the soil particles, increase the water-stable aggregates of the soil and coordinate the water, fertilizer, gas and heat conditions of the soil. It is good for improving the barren soil such as too gravel or too sticky, thus improving the ecological environment of the crops. When improving the saline soil, potassium fulvic acid’s more active genes and large base exchange capacity can enable the soluble salts in the soil to adsorb and retain a greater number of detrimental cations, which can reduce the soil salinity and the PH value of saline alkali soil, thus improving the ecological environment of the crops.

2.【To improve efficiency】

  As potassium fulvic acid can adsorb, exchange and activate many mineral elements in the soil, such as phosphorus, calcium and magnesium, the effectiveness of these elements can be greatly increased, thus improving the crops’ nutritional conditions. Potassium fulvic acid works as fertilizer synergist, and it can also reduce the negative impact of the chemical fertilizers on soil physical and chemical properties. Its synergism effect on nitrogen fertilizer shows in that it can reduce the volatilization loss of nitrogen, has a conspicuous synergism effect on urea and can make the urea fertilizer efficiency extend longer. It can accelerate the absorption of nitrogen and increase the use ratio of nitrogen. It can speed up the mineralization of organic nitrogen in the soil and improve the content of soil available nitrogen. Its synergism effect on phosphorus fertilizer shows in that it can reduce the soil fixation to phosphorus, thus playing the role of phosphorous-solubilizing. It can transform the indissolvable phosphorus into effective phosphorus and promote the absorption of phosphorus in crops. It can improve the effective utilization of phosphorus fertilizer, promote the organic and inorganic phosphorus transformation in the soil, increase phosphorus moving distance in the soil and  stimulate the crops’ root development. Its synergism effect on potassium fertilizer shows in that it can reduce the soil fixation and absorption to potassium, thus increasing the utilization of potassium. It can promote the release of indissolvable potassium, increase the number of available potassium, alleviate the adverse effects of potassium fertilizer on soil and crops, thus improving the crop quality. Potassium fulvic acid also has a conspicuous synergistic effect on the trace elements.

3.【To stimulate the crops to grow】

  There are a variety of functional groups in potassium fulvic acid working as physiologically active substances, which stimulate the growth and development of crops and their physiological metabolism, while inorganic fertilizers do not have this feature. Potassium fulvic acid is water-soluble, and it is not only manifested in the stimulation of seeding, root dipping and spraying on various crops, but also in the stimulation of root absorption. It can promote seed germination and raise the emergence and seedling rate. Meanwhile, it plays a special role in promoting the root development, which can accelerate the seedling root, increase more secondary roots, elongate the roots and enhance the plants' ability to absorb water and nutrients. The stimulation of potassium fulvic acid on some crops shows in their vigorous growth, plant height, strong stem, etc., and it is particularly evident in the early period. Potassium fulvic acid is absorbed by the roots of plants and then stimulates the physiological metabolism of the plant cells, which manifests in the increase of respiratory strength and intensity of photosynthesis. Foliar application of potassium humic acid can shrink the stomatal opening of the leaves, reduce the transpiration of moisture and increase the activity of the enzymes in the root system.

4.【To resist diseases】

  The high organic matter content in the soil provides a good environment for the beneficial microorganisms. The beneficial species gradually develop as the dominant populations and they can inhibit the growth of harmful bacteria. Moreover, due to the excellent soil conditions, the plants grow strong and their resistance to diseases strengthen, thus greatly reducing the diseases, especially the occurrence of soil diseases.

5.【To enhance the crop resistance】

  The plant growth conditions are composed of many factors such as soil, water, nutrients, temperature, light and air, and potassium fulvic acid’s buffer role can reduce the adverse effects of crop growth, which enables the crops to resist adverse environment. Potassium fulvic acid can increase the crop resistance to drought and improve water saving ability by 30%. Saving the effect of soil moisture after the effect produced by mulching. The effect of water saving and soil conservation is only inferior to that of film mulching. The resilience of winter crops can be increased by enhancing the crop resistance to cold and using potassium fulvic acid for foliar spraying. With the ability to defend diseases and pests, potassium fulvic acid has a unique effect on preventing and controlling pests, and it is antimicrobial when applied with pesticides.(e.g. when mixed with validamycin, it has synergistic effect.)

6.【To improve the crop quality】

   Potassium fulvic acid will bring very far-reaching influence on improving the quality of crops. In vegetables and fruits, it can improve the content of sugar and vitamin C and reduce the acidity of the fruit quality. In the leafy type crops such as tobacco and vegetables, it can improve the quality of the leaves. In food crops, it can promote the crops to contain more low-molecular organic nutrients.