High-efficiency cultivation management technology and pest control
How to grow green onions? Green onions are one of the most indispensable vegetables in many people's lives. Therefore, most of China has grown green onions, and the history of green onion cultivation has a long history. Let's learn a high-yield cultivation technique of green onions together with Huinong. 1 Overview of factors affecting the growth of green onions Temperature factors, green onions are suitable to grow in the cool, dry and wet weather conditions. The suitable temperature for germination is below 20 °C. If the temperature is below 10 °C, the plants will grow slowly. If the temperature exceeds 25 °C, the green onions are easy to cause diseases. Leaves yellow; water factor, green onion has a certain drought tolerance, but the root system is weak, suitable for growth when the air humidity is above 65%, suitable for growth when the soil moisture needs to reach 75% or more; illumination factor, suitable for dense planting, not strong Light or light for a long time; soil factors, green onions are suitable for growth in well-drained soils with deep soil layers, nitrogen fertilizer in the early growth stage, and phosphorus and potassium fertilizers in the late growth stage to promote nutrient absorption. 2 green onion planting technology 2.1 improved seed selection Feixian County is dominated by Chinese green onions, Zhangqiu green onions, chicken leg green onions, and Anguo irons. There are also lobes and onions, and the varieties are high-footed white, long scallions and so on. sowing. The seeds of the green onion are small, the seed coat is relatively thick, the seedling period is relatively long, the seedling growth is slow, the seedbed should be finely finished, and the water is poured into the water and then spread. The amount of the seed is about 75~100g per 667m2, and the thickness of the soil is controlled at 2cm. Left and right, to enhance moisturizing and heat preservation effect, to ensure the emergence rate. After the sowing, water should be properly watered, and insecticide should be added to the water to prevent the occurrence of pests during the period. The soil moisture is controlled at about 60%. Cultivate strong seedlings, seedling selection, green onions suitable for cultivation in sandy loam with good drainage and deep soil, to achieve the purpose of venting loose soil and soil and high yield. However, due to the green onion in the cultivation process to soften and avoid continuous cropping. To this end, the green onion in the process of breeding, to follow its growth and development characteristics, choose the former non-onion vegetables for seedlings. After the land has been turned over, it should be turned over twice, and the time is controlled at 15~20d. After that, the trench system is opened to facilitate the drainage performance of the plot. 2.2 Seedling management The suitable temperature for germination of green onion seeds is about 18 °C. Generally, the seedlings can be emerged 5~7 days after sowing. At this time, the cover or cover soil should be removed. The transpiration of the leaves at the seedling stage is slow and the growth is slow after the emergence of the seedlings to the three-leaf stage. Seedlings and weeds, seedling distance control is about 7~10cm, controlling fertilizer and water, promoting root development. And cover the dry fine soil in time to avoid the occurrence of pests and diseases after heavy rain. top dressing. It takes about 3~4 times to topdress the whole seedling stage. In this process, it is advisable to use quick-acting organic fertilizer and chemical fertilizer alternately to promote the growth of seedlings. 3 colonization Colonization time. In the late May to early June, the onion height is 35cm, and the horizontal diameter is 1cm thick, which can be poured into the water, and seedling, transplanting and planting. Colonization tools. Use a gardening rod with a diameter of about 1.5cm or a correspondingly sized iron rod to make a shallow hole perpendicular to the ground. After inserting the green onion seedlings, lift it up slightly, so that the roots of the green onion must be lowered. Colonization method. Before planting, it is necessary to remove dead leaves and pests and diseased seedlings, and classify the thick and non-forked seedlings according to their size. The planting density is about 100~120cm, and the plant spacing is 2.5~3cm. Avoid planting the onion seedlings during planting, and do a good job of preventing drought and rain after flooding and preventing flooding, yellow leaves and dead seedlings. After planting, the loose soil on both sides of the onion plant is compacted and then watered. 4 Field management Every year from late August to early September is the growth period of onion leaves and scallion. The key to planting at this time is to promote root absorption, strong roots and softening of soil. Watering, topdressing and soil cultivation should be carried out in time to promote the rapid growth of onion white. Management, creating suitable environmental conditions for the formation of scallion, and increasing the yield and quality of green onions. 4.1 watering Watering should be diligent, irrigation should master the principle of light pouring and early and late watering, time should not be separated for too long, to ensure that the soil of the green onion field is moist, but should stop watering 1 week before harvest to avoid soil compaction, affecting harvest And storage and transportation. During the watering process, the cultivating and loosening and weeding work should be carried out several times to promote root development. After the white dew, the green onions grow more vigorously. Under the premise of watering, the soil should be kept moist. 4.2 Fertilization The green onion fertilization is generally based on organic fertilizer, and then it can be applied with formula, such as nitrogen, phosphorus and potassium, and applied once every 15 days. Apply urea 10~15kg per acre and 15kg superphosphate. However, in order to rapid growth of scallion and softening of the sheath, it is necessary to carry out topdressing and soil cultivation. 4.3 soil The soil is plucked once every 15 days, and it is selected after drying in the morning. The soil can effectively soften the sheath and prevent lodging. During this period, combined with topdressing and watering, it can effectively avoid the occurrence of rotten roots. The soil should be increased according to the age of the seedlings. Gradually thicken, increase, the highest height is not to have no heart leaves. 5 pest control 5.1 purple spot disease Mainly harmful to the onion leaves and peduncle, warm and wet summer evening. In the early stage of the disease, 500 times spray of chlorothalonil can be used, once a week for 3 to 4 weeks; 5.2 onion rust Mainly harmful to the onion leaves, stems and peduncle. It is easy to occur when the temperature is lowered or the fertilizer is insufficient. It can be applied with phosphorus or potassium fertilizer or 500 times solution of chlorothalonil for spraying; Hummer and Hummer are one of the main pests of green onion. The nymph and adult thorn suck the onion leaf juice, infectious diseases, and the autumn hazard will increase. It can be sprayed with leprechaun emulsion every 10~15d1 times; the leaf miner, the larvae sneak out of the mesophyll, which is more harmful in autumn and spring. The control method is basically the same as the control method of thrips. 6 harvest At the end of October each year, harvesting can be started, and the dew is dried and harvested. Dry it properly, make sure it is not damaged, and bundle it into small bundles for storage, transportation and sale. The above is the whole content of the green onion planting technology. If you have also planted green onions, then come to Huinong.com to learn about the planting points! Protein Powder,Protein Collagen Powder,Hydrolysed Collagen Protein Peptide Powder,Hydrolyzed Collagen Powder Protein Hebei Haodong Biological Technology Co.,Ltd. , https://www.hdgelatin.com
