Analysis of Relationship between Fertilization and Quality of Welsh Onion by Chlorophyll Content Analyzer

The cultivation history of welsh onion has been in China for more than 2,000 years. Its cultivation value has become more apparent after joining the WTO. The planting area of ​​exporting green onions is increasing rapidly. Due to the cumbersome fertilization process, vegetable farmers are not easy to grasp their technical points, there are often problems such as inappropriate fertilization and transportation, poor nutrition and distribution ratio and scientific problems, resulting in serious loss of nutrients, which not only pollutes the ecological environment, but also increases production costs. Controlled-release fertilizer can significantly increase the yield of pepper, and the controlled release compound fertilizer has the best nutritional quality and safety quality of the pepper. Solve the problems in the production of green onions, while providing a theoretical basis and technical support for the controlled release fertilizer on a large area of ​​large onion popularization and application. For the value of green onions is mainly reflected in its leaves on the hypertrophy, the quality of its leaf quality chlorophyll content is also one of the indicators for the determination of chlorophyll selected chlorophyll content measuring instrument for determination.

Through the determination of chlorophyll content analyzer, it was found that the chlorophyll content of scallion radishes slightly increased during the middle period of welsh onion growth, and the chlorophyll content of all treatments decreased during the later growth period. The content of chlorophyll in C. sinensis treated with CCF for 30 d after planting was the highest, which was 0.77 mg/g, which was related to the rapid release of effective nutrients in the early stage of CCF. After 60 days of setting, the content of CRF3 was the highest, which was 17.34% higher than the control and 0.89% higher than that of the CCF treatment. At 90 days after colonization, the chlorophyll content of Chinese green onions treated with CRF2 was higher than that of other treatments, which was 33.04% and 20.77% higher than that of the control and CCF treatments, respectively. It shows that CRF2 treatment is beneficial to the synthesis of chlorophyll.

Compared with common compound fertilizers, controlled-release fertilizers could increase the content of chlorophyll and soluble protein in scallion, which increased by 24.09% and 56.03% respectively. The contents of total N, total P, and total K also increased significantly. The yield per unit area of ​​controlled-release fertilizer on scallion was about 10% higher than that of ordinary compound fertilizer, indicating that controlled-release fertilizer can improve the quality of green onions and increase the output of green onions.

Chlorophyll content determination instrument chlorophyll content of green onions, generally at the same fertilization level, controlled release fertilizer treatment of green onion nitrate content in the body lower than the ordinary compound fertilizer treatment 2.62%, indicating that controlled-release fertilizer can improve the safety of onion safety quality. Controlled-release fertilizers can improve the growth environment of the onion root system and thus increase the vitality of the root system.