Method for rapidly testing tissue juice to judge nitrogen nutrition of ricinus communis

Abstract

The invention relates to a method for rapidly testing tissue juice to judge nitrogen nutrition of ricinus communis. The method comprises the following steps: judging the concentration of nitrate in tissue juice of a ricinus communis plant so as to judge the nitrogen nutrition state of ricinus communis, confirming the present nitrogen nutrition level of ricinus communis according to a relationship equation of the concentration of nitrate in the tissue juice and the fertilizer dressing amount, and judging whether a nitrogen fertilizer needs to be dressed or not, thereby obtaining an optimal dressing amount. By adopting the method, the nitrogen nutrition level of ricinus communis can be accurately reflected at appropriate time, sampling and testing can be completed in fields, and a recommend dressing amount is provided on site. The defects that a conventional method is high in blindness, uncertainty and impact factor, needs large-size instruments for analysis and is hysteretic in recommended result are reduced, and the method provided by the invention is relatively accurate, direct and reliable in prediction result.

Description

technical field [0001] The invention belongs to the field of castor cultivation technology management, and in particular relates to a method for judging the nitrogen nutrition of castor by using tissue juice rapid measurement. Background technique [0002] Castor bean (Ricinus communis L.) is a plant of the genus Ricinus in the family Euphorbiaceae, a perennial herb with dicotyledonous annual life. There are more than 3,000 derivatives of castor oil, which are widely used in national defense, aviation, aerospace, chemical medicine and machinery manufacturing, etc., and are irreplaceable in some special nylon and aviation lubricants. The strategic material has been valued by all countries. [0003] Castor has the characteristics of large biomass, long reproductive growth period, and large nutrient demand. High-yield castor requires a certain nitrogen supply intensity as a basis, but excessive nitrogen supply will cause an imbalance between vegetative growth and reproductive ...

AI Technical Summary

Problems solved by technology

Under the high-density planting mode, castor has the characteristics of long flowering and fruiting period (that is, long coexistence period of vegetative growth and reproductive growth), and large population biomass. There is a particularity in the nitrogen nutrition physiology. It is a difficult problem that high nitrogen fertilization causes the disorder of vegetative growth and reproductive growth to reduce yield. Therefore, the nutritional diagnosis of castor plants is obviously different from that of other crops, and the technology and method of nitrogen nutritional diagnosis of castor have not been reported yet.

In addition, the existing methods for plant nutrient diagnosis require the use of laboratory instruments such as centrifuges and ultraviolet spectrometers, which cannot achieve rapid field testing, and the recommendation results often lag behind seriously in time, and the application of the technology is affected.

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