Corn empty stalks refer to plants with culms that have no ears or spikes. The corn stalk is a thorny problem that is often encountered in production, and has a great impact on the yield and economic benefits of corn.
First, the cause of empty stalk (a) over-close planting causes corn male and female ear malnutrition. (b) Drought or lack of fertilizer before flowering. (3) Malnutrition is caused by weak seedlings caused by missing seedlings or seedlings after the lack of seedlings.
Second, control measures (a) a reasonable determination of planting density. Generally, the late-maturing varieties have long growth periods, tall plants, and luxuriant stems and leaves, which can be appropriately sparsely planted, such as Nongda 108, with a control of 3,000 or less per acre. Medium-maturing varieties can be properly planted, such as Zhengdan 958, Ludan 50, Ludan 981, and other varieties, controlled within 4,000 per acre. Early-maturing varieties such as Daidan 4 and Luyu 10 are more dense than comparable mid-maturing varieties. The land with poor soil fertility, water and fertilizer can not keep up with the plant can be sparse, soil fertility is higher, the density can be more appropriate. (b) Appropriate time seedlings. In combination with removing seedlings from weak seedlings, the management of corn fields should highlight an early word. Before the three-leaf stage, the seedlings are started, and the seedlings are 3 to 4 times. Before the jointing, the seedlings are to be set and the seedlings are to remain strong and weak, so that the Daejeon seedlings are evenly balanced. For the lack of seedlings in the field, it is not appropriate to use seedlings or transplants to obtain seedlings. All can be used to cover two plants. (C) timely fertilization and watering before and after flowering. The heading and flowering period of corn is a flourishing period in which both vegetative growth and reproductive growth go hand in hand. In this period, a large amount of fertilizer and water are needed to meet the needs of growth. If the fertilizer is not timely, the ear cannot be differentiated, and it is most likely to cause empty stalks. Therefore, when the weather is dry or there are symptoms of fertilizer deficiency, it should be timely watering, topdressing urea, diammonium and so on.
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Vanillin is a phenolic aldehyde, which is an organic compound with the molecular formula C8H8O3. Its functional groups include aldehyde, hydroxyl, and ether. It is the primary component of the extract of the vanilla bean. Synthetic vanillin is now used more often than natural vanilla extract as a flavoring agent in foods, beverages, and pharmaceuticals.Vanillin and ethylvanillin are used by the food industry; ethylvanillin is more expensive, but has a stronger note. It differs from vanillin by having an ethoxy group (–O–CH2CH3) instead of a methoxy group (–O–CH3).
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