Method for increasing nitrogen utilization efficiency of rape

Abstract

The invention discloses a method for increasing nitrogen utilization efficiency of rape, and provides a method for increasing the nitrogen utilization rate by reducing nitrate nitrogen content in rape plants. The method comprises the following steps of: culturing rape seedlings in a glass net chamber by using Hoagland complete nutrient solution (the nutrient solution comprises 5 mmol / L of KNO3, 1 mmol / L of KH2PO4, 7 mmol / L of MgSO4, 5 mmol / L of Ca(NO3)2.4H2O, 3 mmol / L of Fe-EDTA, 0.5 mmol / L of B, 0.5 mmol / L of Mn, 0.05 mmol / L of Zn, 0.02 mmol / L of Cu and 0.01 mmol / L of Mo) through soil culture; seeding in September in the same year; transplanting in a big field after one month; complementarily applying 5 kg of urea for every mu after transplanting and reviving at the seedling stage; irrigating at a proper stage and dressing bolting flower fertilizer; dressing 7.5 kg of budding bolting fertilizer urea per mu in coordination with spring irrigation in spring; and uniformly spraying inhibitor solution simultaneously containing 50 mmol / L of Bafilomycin A1 and 20 mumol / L of DCCD (N, N'-dicyclohexylcarbodiimide) at the beginning of florescence of rape once every six days until a pod development stage begins. The content of nitrate nitrogen in the plants can be obviously reduced, and further the nitrogen utilization efficiency of the rape plants is obviously increased.

Description

technical field [0001] The invention relates to a plant cultivation method, in particular to a method for reducing the nitrate nitrogen content of rapeseed plants so as to improve nitrogen utilization efficiency. Background technique [0002] my country's annual nitrogen fertilizer consumption is 25 million tons (pure nitrogen), ranking first in the world, but the rate of diminishing returns on nitrogen fertilizers is becoming more and more serious. In many places, nitrogen fertilizers have increased, and yields have stopped increasing or even decreased, seriously violating low-carbon economic requirements. In addition, the increase of nitrogen fertilizer has made the nitrate content in crops soar, which has become one of the main factors restricting the foreign exchange earning of my country's agricultural products export. Therefore, it is one of the hotspots in the research of plant nutritional efficiency in recent years to improve the nitrogen use efficiency from the plan...

AI Technical Summary

Problems solved by technology

[0005] It can be seen that there has been some research on improving plant nitrogen use efficiency at home and abroad, but so far there is no general and effective method, and there are few reports on the combination of tonoplast proton pump activity and nitrogen use efficiency.