The peak period of soybean fertilizer needs to be in the reproductive growth stage, that is, in the late growth stage. These nutrients are taken from the soil below the plough layer, and the nutrient conversion and release ability of the soil below the plough layer is much lower than that of the plough layer. At this time, the soybean root system has gradually aging and the absorption capacity is reduced, which is prone to nutritional deficiency and premature aging. It has become a major factor limiting the high yield and stable yield of soybeans. Spraying nutrient solution outside the roots of soybean pods can alleviate the contradiction between the peak of soybean fertilizer and soil fertility, accelerate the accumulation, transformation and transportation of assimilation products, and promote the nitrogen fixation and root activity of rhizobium. Improve the ability of roots to take up nutrients.
The preparation method of the external spray fertilizer is: urea solution 2%, superphosphate solution 4-5%, potassium sulfate solution 4.5%, boric acid solution 0.05%, dissolved in 25 kg of water, filtered to be nutrient solution. Foliar spray should be carried out after 5 o'clock in the afternoon or in the evening, so that the leaves are evenly stained with nutrient solution without flowing, and sprayed 3 times, every interval of 3 to 4 days.
Huaxian County Shang Hongyan
The preparation method of the external spray fertilizer is: urea solution 2%, superphosphate solution 4-5%, potassium sulfate solution 4.5%, boric acid solution 0.05%, dissolved in 25 kg of water, filtered to be nutrient solution. Foliar spray should be carried out after 5 o'clock in the afternoon or in the evening, so that the leaves are evenly stained with nutrient solution without flowing, and sprayed 3 times, every interval of 3 to 4 days.
Huaxian County Shang Hongyan
ã€Comment】 ã€Print this article】 ã€Close this page】 ã€Large, medium and small】
Baochuan Wire Mesh Products Co., Ltd. , http://www.anp-wiremesh.com