New technology synergistically increases grain yield and protein content of winter wheat

Increasing grain yield and protein content are two important goals for wheat production in the North China Plain.

Recently, Zhang Yinghua's research team from the Crop Ecophysiology Research Team of China Agricultural University cooperated with the Agricultural College of Anhui Agricultural University to publish a research paper online in Acta Crop.

Under limited water irrigation, compared with traditional border irrigation, the integrated mode of micro-spraying water and fertilizer increases the amount of micro-spraying and water and nitrogen backward shifting, using root and canopy double layer absorption, increasing the water and nitrogen supply after flowering, and It reduces the canopy temperature, improves the microenvironment of the canopy, significantly delays leaf senescence in the late filling stage, prolongs the duration of grain filling, increases post-flowering material accumulation, and increases the grain filling rate, thereby increasing the thousand-grain weight and increasing the grain yield; At the same time, the amount of nitrogen uptake after anthesis and its contribution to grain nitrogen increased, and the increase in nitrogen accumulation in grains was higher than the increase in yield, so the protein content of grains at maturity increased.

In short, the integrated mode of micro-spraying water and fertilizer under the limited total amount of water and nitrogen, through a small number of multiple micro-sprays and the integrated back movement of water and nitrogen, coordinated the contradiction between post-flowering material accumulation and pre-flowering nitrogen transfer, resulting in yield and protein content The improvement of the plant is more dependent on the contribution of carbon and nitrogen accumulation after flowering.

Related paper information: org/10.