Third, the lack of flowers Measuring length: straightedge, tape measure, micrometer, micrometer, level meter; Measuring Tools,Tape Measure,Digital Vernier Caliper,Spirit Level Pen,Mutifunction Tape Measure Rugao Yaou Import & Export Trade Co., Ltd , https://www.ntyaou.com
Measuring angle: protractor, dividing head, theodolite, sextant, knife-edge angle ruler;
Weather measurement: thermometers, barometers, wind vanes, rain gauges, computers, and satellites.
More conventional: projector, hardness tester, hundred grid knife, etc.
Measuring tool: It is a tool for measuring a certain property. Including length, temperature, time, mass, force, current, voltage, resistance, sound, radio, refractive index and average dispersion.
Weight measurement: balance scale, floor scale, spring scale, etc.;
Temperature measurement: thermometer, thermometer, etc.;
Pressure measurement: pressure gauge, pressure transmitter, etc.;
Flow measurement: flow meter, differential pressure detector, etc.;
Liquid level measurement: differential pressure gauge, liquid level gauge, etc.;
Electric energy measurement: voltmeter, ammeter, field strength meter, frequency meter, etc.;
Composition measurement: analyzer, chromatograph, etc.;
Acid-base measurement: acidity meter, alkalinity meter, etc.
Formula fertilization technology for flower production (3)
1. Nitrogen deficiency: When the nitrogen is insufficient, the growth of the flower is hindered, and the growth amount is greatly reduced. At first, the color becomes lighter, and then the yellowing falls off, and generally no necrosis occurs. The symptoms of green deficiency always start on the old leaves and develop on the new leaves. Branching is inhibited during nitrogen deficiency. In the absence of nitrogen, due to the accumulation of sugar in the tissue to promote the synthesis of anthocyanins, stems and petioles often turn purple.
2. Phosphorus deficiency: Phosphorus is highly mobile in plants and can be rapidly transferred from old leaves to shoots and meristems. Therefore, the symptoms of phosphorus deficiency are first manifested on old leaves. When the flower is deficient in phosphorus, the leaves are dark green. The accumulation of soluble sugar leads to the formation of anthocyanins due to the accumulation of phosphorus, and the stems and veins become purple. Necrotic areas may also occur in various parts of the plant during severe phosphorus deficiency. Phosphorus deficiency also inhibits flower growth, but it is not as severe as nitrogen deficiency. However, the growth inhibition of roots is more than nitrogen deficiency.
3. Potassium deficiency: Potassium is highly mobile in plants. When plants are deficient in potassium, they first appear on old leaves. In the absence of potassium, the leaves showed a mottled green area, and then a necrotic area was produced along the leaf edge and tip. The leaves were curled and finally blackened and burnt; the growth of the stem was weakened and the disease resistance was reduced.
4 , calcium deficiency: due to the poor mobility of calcium in plants, the symptoms of calcium deficiency in plants first manifested in new leaves, the typical symptoms of calcium deficiency are the tip and leaf margin necrosis of young leaves, then the buds Necrosis, the apex will also stop growing, discoloration and death.
5 , lack of magnesium: the typical symptoms are lack of green between the veins, sometimes red, orange and other bright colors, a small area of ​​necrosis in severe cases. Since magnesium is easy to flow in plants, symptoms of magnesium deficiency usually occur on old leaves. Magnesium deficiency is also likely to occur when potassium is used in large quantities.           Â
6. Sulfur deficiency: The symptoms of sulfur deficiency are similar to those of nitrogen deficiency, such as uniform chlorosis and yellowing of leaves, formation and accumulation of anthocyanins, and inhibition of growth. However, sulfur deficiency usually begins with young leaves and is less severe.
7 , iron deficiency: the typical symptom is lack of green. Iron does not move in plants, so iron deficiency first manifests in young leaves. The green deficiency of iron deficiency is characterized by yellowing between veins and leaves, and the veins remain green. Generally, there is no growth inhibition or necrosis. Plants are often deficient in iron in alkaline or calcareous calcareous soils because iron in the soil is in the form of insoluble iron oxide or iron hydroxide under alkaline conditions. Excessive magnesium in the soil also affects the absorption of iron. Although iron can be absorbed by plants in the state of Fe3+, it is necessary to reduce the physiologically active Fe2+ state in plants. Manganese is an oxidant, and when the ratio of manganese/iron is deregulated, iron will exist in the state of Fe3+ and lose physiological activity. Â Â Â
8. Zinc deficiency: The typical symptoms of zinc deficiency are inhibition of internode growth, severe leaf deformity, and inhibition of apical dominance, which may be caused by insufficient supply of auxin (IAA), as zinc and zinc are required for auxin synthesis. The lack of green leaves is also a common symptom of zinc deficiency. Symptoms of zinc deficiency are more likely to occur on neutral and alkaline soils. Zinc deficiency in the soil in many parts of China, and affecting crop yields, including plant yields, will be affected. At the same time, people in the region have long-term consumption of zinc-deficient foods, which also affect people's health. Zinc fertilizer is often encountered in the application of zinc fertilizer, zinc fertilizer is generally used as a root external dressing effect, can avoid zinc and phosphorus antagonism. Â Â Â Â Â Â Â
9. Boron deficiency: The typical symptoms of boron deficiency are thickening of leaves and darkening of leaves, death of meristems of shoots and roots, and development of roots and shoots caused by boron deficiency; the development of boron deficiency is slow, soil The effectiveness of boron in the medium is affected by calcium. The high content of calcium in the soil can reduce the absorption of boron. The reason may be that calcium causes the boron to recombine or precipitate in the soil, or reduce the absorption capacity of boron by the root system.
10 , lack of manganese: the symptoms of manganese deficiency is the lack of green leaves, and the formation of small necrotic spots on the leaves, pay attention to be distinguished from bacterial spot disease, brown spot disease, etc., the symptoms of manganese deficiency on young leaves and old leaves Can happen. Generally, manganese is not deficient in acidic soil, but in soils with a pH greater than 6.5, manganese deficiency is often caused. In soils with high oxidization and alkaline soils, manganese and iron can be converted into inactive states, causing plants to be deficient in manganese. Plant yields are affected when the manganese content is too high or too low. Â Â Â
11. Copper deficiency: The symptoms of copper deficiency are leaf tip necrosis and leaf wilting and blackness. Symptoms first appear on young leaves. When the soil is applied with an excessive amount of phosphate fertilizer, the copper becomes an insoluble precipitate and the effectiveness is lowered. The application of copper sulfate to the edible plant can increase the yield and improve the disease resistance.
12. Deficiency of molybdenum: The initial symptoms of molybdenum deficiency are green and necrosis between old veins, sometimes spotted necrosis. Molybdenum deficiency can also cause symptoms of nitrogen deficiency. It is easily absorbed by plants in soils with higher pH. Â Â Â
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