Because there is enough rain and sunshine in April-May, the growth rate of coriander after planting is faster, and the benefit of planting coriander in August-September is better. Coriander, the scientific name of coriander, is native to the Mediterranean coast. At present, its main producing areas in China are Northeast China, Hebei, Shandong, Anhui, Jiangsu, Zhejiang, Jiangxi, Hunan, Guangdong, Guangxi, Shaanxi, Sichuan, Guizhou, Yunnan and Tibet.
Planting time of southern coriander: it is warmer in the south. Generally, it is better to plant coriander in the autumn of10-1,and harvest it in the spring of the following year. Let the seeds germinate before sowing to promote germination after planting.
Fertilization management of coriander
1, base fertilizer
Combined with base fertilizer, apply decomposed farmyard manure 1000 ~ 3000 kg, diammonium phosphate 20 ~ 40 kg, potassium sulfate 10 kg or compound fertilizer 25 ~ 30 kg per mu.
2. Surface treatment
Before the emergence of coriander, the soil should be kept moist to avoid soil hardening. Seedling height is about 3cm, and seedling fertilizer can be lightly topdressing with water. Apply 8- 10kg of urea and 250g of boron fertilizer per mu, and topdressing urea every 2-3 times.
The seedling height of Lai Xiang is about 12cm, and the water demand increases. Pay attention to watering often with small water. In sunny mornings, water should be poured 1 time every 8 days to increase fertilizer supply, and ammonium nitrate 10kg or ammonium sulfate 25kg per mu of water should be applied to promote plant growth, or potassium dihydrogen phosphate solution should be sprayed in combination with each watering. Spraying 20 mg/L gibberellin before coriander harvest 15 days can promote leaf elongation, make leaf color fresh and tender, increase branches and increase yield.