Special water conservation type rhizosphere fertilizer for flue-cured tobacco seedlings and preparation method thereof

Abstract

The invention discloses a special water conservation type rhizosphere fertilizer for flue-cured tobacco seedlings. The fertilizer is prepared from, by mass, isobutylidene diurea, potassium magnesium phosphate, nitrate of potash, a potassium humate organic and inorganic water-retaining agent, sodium borate, zinc oxide, blue vitriol, ferrous sulfate, manganese sulfate, ammonium molybdate, limestoneflour, chitosan and a root growth promoting agent. The special water conservation type rhizosphere fertilizer is adopted to spray the seedlings at the outsides of flue-cured tobacco roots, one-time fertilizer applying is achieved on the flue-cured tobacco seedlings, compared with a traditional seeding growing mode, fertilizer applying of 2-3 times is reduced, and the fertilizer applying amount isreduced by 20-30%; the biomass of the grown flue-cured tobacco seedlings is increased by 15% or above, and the tobacco seedling root shoot ratio is improved by 20% or above; the total root lengths ofthe grown seedlings are improved by 150% or above, the common root area is increased by 30% or above, the stem diameter is increased by 20% or above, and the strong seedling index is improved by 30% or above. Therefore, the fertilizer has the effects of significantly reducing the fertilizer applying amount for the flue-cured tobacco seedlings and improving the agricultural labor productivity efficiency and the economic benefit, and has a wide market prospect.

Description

technical field [0001] The invention relates to the field of flue-cured tobacco planting and fertilizer technology, in particular to a special water-retaining rhizosphere fertilizer for flue-cured tobacco seedling cultivation and a preparation method thereof. Background technique [0002] Fertilizers that can be applied directly to the rhizosphere of crops are called rhizosphere fertilizers. At present, the rhizosphere fertilizer products are mainly concentrated in forest trees, fruit trees, and vegetables. For example, the rhizosphere fertilizer used by Zhengzhou University for palm is mainly composed of urea-formaldehyde, magnesium ammonium phosphate, and molten phosphorus and potassium. However, the water-retaining rhizosphere fertilizer of the flue-cured tobacco root spray seedling raising technology aimed at the nutritional requirements of flue-cured tobacco seedlings has not been reported yet. [0003] At present, water-soluble nitrogen, phosphorus, potassium and medi...

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Problems solved by technology

[0004] Flue-cured tobacco root spray seedling raising technology is different from flue-cured tobacco floating seedling raising technology. This technology discards the nutrient solution cultivation technology, and uses root spraying to supply water and rhizosphere one-time fertilization technology. However, the salt index of traditional chemical fertilizers is high. If applied to the seedling substrate of flue-cured tobacco spray seedlings, it will cause the problem of burning seeds and seedlings; if the method of foliar spraying is adopted, the leaves will be burned if the fertilizer concentration is high, and the frequency of fertilization will be increased if the concentration is low, which will increase the labor cost. Moreover, the demand for water and fertilizer at the seedling stage of flue-cured tobacco is often not synchronized. If water and fertilizer are supplied at the same time, it will interfere with the physiological activities of the leaves, thereby affecting the growth of flue-cured tobacco.

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