It is the summer corn dressing season. Comparing the summer corn with the spring corn, the summer corn has two major characteristics. First, the growth period is short, usually about 100 days. The seedling growth is in the high temperature and rainy season. The second is the summer corn planting pattern for the winter wheat-summer corn rotation. system. In some areas, farmers harvested the winter wheat and immediately sowed the summer corn. The farmers called this time the Three Summers period to grab the crop and grab it. Since it is a double grab, there will be no time to turn the ground and the soil preparation, and the summer corn will not be applied to the seed fertilizer. In some areas, corn is planted before wheat is harvested. The common feature of the above two types of areas is that no basal fertilizer can be applied before sowing summer corn. Therefore, the method of fertilizing summer corn depends on seed fertilizer and top dressing. How to grasp the summer corn seed fertilizer and top dressing it? This introduces the fertilization experience of Chen Aiguo, a plantation specialist in Wangdu County, Hebei Province. The specific method is to apply the seed fertilizer in the summer corn planting. The amount of the seed fertilizer is about 10 kg/mu, and the compound fertilizer with the proportion of nitrogen, phosphorus and potassium of 15%-10%-15% is selected for the fertilizer. The fertilization method is to fertilize and then cover the soil. Such as maize seedlings grow to the trumpet period, he timely fertilizer the second time, Mushi 20 kg of urea, buried after the hole, and then irrigation. In the past two years, the average yield of the summer corn that he planted at the time of harvest was more than 450 kg, and some of them reached a sturgeon.
Expert analysis: The fertilization method has the following points worth following:
1. Miaofei's time is well-accepted, which reflects the principle that timely application and top-dressing of summer corn seedlings should be applied in a timely manner.
2. The characteristics of NPK nutrient balance application of seedling fertilizers are reflected in the fertilization types, and the characteristics of topdressing N fertilizers during the growing season are also highlighted. The first time the seedlings were treated with nitrogen, phosphorus and potassium fertilizers, and the second top dressing was applied with nitrogenous fertilizers.
3. In the determination of the amount of fertilizer, both fertilizers were applied to compound fertilizer and urea. The yield of summer corn obtained in that year was 450-500 kg/mu. This amount of fertilizer is an economical and optimized reasonable amount.
[Composition]
The main component of this preparation is human immunoglobulin, which is prepared by cold ethanol fractionation of human plasma from healthy donors. The manufacturing process contains a step to remove anticomplementary activity and a dual viral inactivation process. It contains a suitable amount of glucose or maltose as stabilizer (see table below), but does not contain any antiseptic or antibiotic. The distribution of IgG subclasses is close to the serum level of normal subjects and maintains the bioactivity of Fc fragment of IgG.
[Indications]
1. Primary
agammaglobulinemia, such as X-linked hypogammaglobulinemia,
common variant immunodeficiency diseases, immunoglobulin G subclass deficiency,
etc.
2. Secondary
immunoglobulin deficiency diseases, such as severe infection, septicemia of
newborn, etc
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