There are three main reasons for the delivery of corn: 1. The fertility of soil, especially the plot of nitrogenous fertilizer. 2. Maize seedlings are damaged due to thrips and aphids, causing loss of apical dominance. 3, the characteristics of individual varieties. Control methods: 1, select the appropriate species, eliminate the easy-to-delivery varieties. 2, formula fertilization, not partial nitrogen fertilizer. 3, timely control of corn seedling pests and diseases. 4, early snoring, try not to hurt the main stem corn.
Hormone:
A chemical
substance produced in the body that controls and regulates the activity of
certain cells or organs. Many hormones are secreted by special glands, such as
thyroid hormone produced by the thyroid gland. Hormones are essential for every
activity of life, including the processes of digestion, metabolism, growth,
reproduction, and mood control. Many hormones, such as neurotransmitters, are
active in more than one physical process.
Endocrine:
Pertaining to
hormones and the glands that make and secrete them into the bloodstream through
which they travel to affect distant organs. The endocrine sites include the
hypothalamus, pituitary gland, pineal gland, thyroid, parathyroids, heart
(which makes atrial-natriuretic peptide), the stomach and intestines, islets of
Langerhans in the pancreas, the adrenal glands, the kidney (which makes renin,
erythropoietin, and calcitriol), fat cells (which make leptin). the testes, the
ovarian follicle (estrogens) and the corpus luteum in the ovary). Endocrine is
as opposed to exocrine. (The exocrine glands include the salivary glands, sweat
glands and glands within the gastrointestinal tract.)
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