Nepeta

(I. Overview

Alias ​​incense, mustard, Artemisia quadrangularis, false su.

The whole plant and flower (fruit) ear (Nepeta paniculata) of the Nepeta schizonepeta tenuifolia Briq. Published, scattered wind, rash, charcoal to stop bleeding. Indications of colds, headaches, measles, skin itching; charcoal governance hematochezia, uterine bleeding. It is mainly cultivated in Jiangsu, Zhejiang, Shanxi, Hebei, Hubei and Hunan provinces.

(b) Plant characteristics

Annual herb, 60-80 cm high, has a strong aroma. Stems erect, base purplish, upper branches, pubescent. Leaves opposite, subsessile; leaves 3-5-pinnately lobed, lobes stripe or lanceolate, 1.5-2 cm long, 0.2-0.4 cm wide, entire, both surfaces softened Hair, below the pit glands. Flowering from June to August, round umbels, many rounds crowded on branches, forming long spikes, 3 to 8 cm long; sessile bar-shaped bracts; flowers small, calyx bell-shaped, coats, apex 5-toothed Corolla 2-lipped, with upper and lower lips nearly equal, slightly exceeding calyx, pinkish white. Stamens 4, two strong. Nutlets 4 pieces. Oval or oval. Brown, shiny.

(III) Growth characteristics

Born in the roadside, ditch and pond, grass and mountain slope.

(4) Cultivation techniques

1. Site preparation

Choose sunny, good irrigation and drainage conditions, loose and fertile land cultivation. Early arable land, deep plowing, after the harvest of the former crop, 3000 kilograms of fertilizer per 1/15 hectares of manure, 15 kilograms of phosphate fertilizer, 10 kilograms of urea, and 2 kilograms of Bataan to reduce the underground pests. Deep plowing 25 centimeters, leveling, plowing after freezing in the second year, and doing the plowing. The width is 120 cm, depending on the terrain and seeds. Nepeta is very small, so the land must be finely leveled, which is beneficial to emergence.

2. Selected to stay

Plants with large plants, leafy leaves, large spikes and strong aroma were selected for planting. In October, the Nepeta was red and when the seeds were dark brown or brown, the ear was cut and placed in the sun in the field. After drying, the Nepeta was shaken or beaten, causing a large number of species to fall off. Remove the seeds, remove the impurities, or tie the ears to a small handle and dry them to thresh. Put it in a cloth bag and put it in a ventilated and dry place.

3. sowing

Nepeta sowing and drilling, broadcast as well, should be air and light, not easy to get the disease. The first sowing in March, when it grows to 150-200 cm, it will be harvested with high yield and good quality. The second sowing in June, such as rapeseed, wheat can be planted after harvest, the fall can be about 120 centimeters long, production, quality than spring sowing poor. The relatively dry areas are used for early broadcast or deep sowing before broadcast. Sowing method: According to the spacing of 20 cm to open a 0.5 cm deep shallow ditch, the seeds evenly scattered into the ditch or surface, covered with a thin layer of fine soil, germinate about a week, sowing rate of 7.5 to 15 kg per hectare. Spreading requires sowing and broadcasting. After sowing, the ground is gently patted with a broom, so that the seeds and soil can be soiled together. The sowing amount per hectare is 15 to 22.5 kg.

4. Field management

During the seedling stage, the soil should be kept moist and the watering should be done to prevent the leaves from soiling, otherwise the seedlings will die. When the seedlings grow 5 centimeters in height, combined with seedlings, it is necessary to make up the seedlings and ensure the whole seedlings. Plant spacing 5 to 10 cm, often weeding on the seedlings, stop after ridge closure. If seedlings grow very weak, topdressing urea is 75 kg per hectare.

5. Pest Control

(1) Root rot

In July-August, fungi developed due to high temperatures and rainy conditions. After infection, the shoots quickly wilted, and the roots and rhizomes became black and rotted.

Control methods: Pay attention to drainage, treat 7 kg of enemy pine 15 kg per hectare before sowing, and treat the soil. At the beginning of the onset of the disease, 500 times of nitrochlorobenzene was used to irrigate the rhizosphere.

(2) Blight

Occurred in May to June, low temperature and rain, the soil is very wet and easy to get, the beginning of the seedlings of the seedling stem brown water spots like black spots, small black spots expand, brown, stem base thinning, lodging dead.

Control methods: Select good breeds, strengthen field management, and do a good job of drainage work. When it comes to low temperatures and rain, it takes 1:1:100 times more Bordeaux mixture, 10 times a day, and 2 to 3 times. At the beginning of the disease, 50% thiophanate-methyl 1500-fold solution was used for prevention and treatment.

(5) Harvest processing

When Nepeta first blooms, it comes with the best quality. Generally 2/3 of mature ear, 1/3 full, strong aroma, in the production than the normal harvest time 5 to 7 days ahead of harvest, when the flower is in full bloom or open flowers, ear green, will seed, The herbs harvested at this time are of good quality. Choose sunny morning dew just out of date, use a sickle to cut, while cutting edge transport, can not be sun in the hot sun, dry in the shade, dry after the bundle into the whole Nepeta, cut the spike for the Nepeta ear, the remaining stalk For the Nepeta stalks, the Nepeta seeds used for planting can also be used medicinally, but the quality is worse. Spring sowing produces 6000 to 7500 kilograms, and summer sowing produces 4500 kilograms.

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