How does the greenhouse delay the cucumber in the autumn, do the hoeing and sowing?

Apply fertilization and land preparation in time before making a sputum. The amount of base fertilizer is determined according to the situation of the former cockroaches. Generally, 3000 kg of high-quality rotted manure is applied per acre. In autumn, cucumber plants are easy to grow, and should be applied with phosphorus and potassium fertilizer. Each acre can be combined with 100 kg of superphosphate and 50 kg of ash. At the same time, 15 kg of carbendazim powder or 50% methyl thiophanate powder was sprayed per acre for soil disinfection. Then, the water is poured, and the soil is turned to the ground when the soil is dry and wet.

Autumn delayed cucumber is suitable for small high ridge cultivation. The whole ridge has a width of 60 cm, a furrow width of 90 cm, a ridge height of 10 cm, and two rows; or a small high ridge with a width of 40 cm at the bottom of the ridge. Autumn delay cucumbers are mostly planted in the north-south direction. The general line spacing is 75-80 cm. The cultivation line should be placed under the ejector pole in the greenhouse to prevent the occurrence of cucumber disease caused by water leakage. Soak seeds and germination before sowing, and then open the ditch on demand. You can first open a small ditch of 3 cm deep and 5-6 cm wide on the ridge. After the water diversion ditch, order it, and put 1 seed every 9-10 cm. After the sowing, the soil is covered with 15 cm, and the seedlings can be released in 3 days. If the grievance is insufficient, watering should be promoted before emergence. After the seedlings are out, they will grow to 2 pieces of true leaves.

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Ketone and Amine

Ketone is a compound in which a carbonyl group is attached to two hydrocarbon groups. According to the different hydrocarbon groups in the molecule, ketones can be classified into fatty ketones, alicyclic ketones, aromatic ketones, saturated ketones, and unsaturated ketones. According to the number of carbonyl groups, it can be further divided into mono-ketones, di-ketones and poly-ketones. In monoketones, if the two hydrocarbon groups attached to the carbonyl group are the same, it is called monoketone, such as acetone (dimethyl ketone). if different, it is called mixed ketones, such as acetophenone (phenyl methyl ketone). Ketone can not form hydrogen bonds, the boiling point is lower than the corresponding alcohol, but the carbonyl oxygen can form hydrogen bonds with water molecules, so the low carbon ketone (lower ketone) is soluble in water. Lower ketones are liquids with a pleasant odor and high carbon ketones (higher ketones) are solids.

Amine is an organic compound in which part or all of the hydrogen atoms in the NH3 molecule have been replaced by a hydrocarbon group. Most of the amines have alkalinity and can be combined with acid to form a salt, which is a raw material for producing synthetic dyes, drugs and so on.

According to the number of replaced hydrogen, it is divided into primary amine RNH2, secondary amine R2NH, tertiary amine R3N, quaternary ammonium salt R4N+X-, for example, methylamine CH3NH2, aniline C6H5NH2, ethylenediamine H2NCH2CH2NH2, diisopropylamine [(CH3)2CH]2NH, triethanolamine (HOCH2CH2)3N, tetrabutylammonium bromide (CH3CH2CH2CH2)4NBr.

Physical properties

Methylamine, dimethylamine, trimethylamine, and ethylamine are gases at room temperature, other lower amines are liquids; higher amines are solids;

The lower amines have ammonia smell, the trimethylamine has fishy smell, and the putrescine (propanediamine) cadaverine (butanediamine) has bad odor;

Aromatic amines are high boiling liquids or low melting solids;

Amine and water can form intermolecular hydrogen bonds;

Primary amines and secondary amines can also form hydrogen bonds between themselves.

Most aromatic amines are toxic. Aniline can cause aplastic anemia. It can be poisoned by inhalation, ingestion, or absorption through the skin. Ingestion of 0.25 mL can cause serious poisoning.

Beta-naphthylamine and benzidine are substances that can cause malignant tumors.

Ketone And Amine

Ketone And Amine,Raspberry Ketone,Polyquaternary Amine,Poly Ether Amine

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