Effect Of Nitrogen Nutrition On Yield And Quality Of Major Wheat Planted In Different Period And Their Physiological Basis

The study was conducted from 2004 to 2005, in the agriculture weather experiment station in Tai-an City(36°11′N,117°09′E,,Elevation 128.6m). Effect of Nitrogen Nutrition on Yield And Quality of Major Wheat Planted in Different Period and Their Physiological Basis was studied systematically by six wheat species: B1,T4,Y15,L14,L23 and S11, by the technical root of combination of field experiment and chemical analysis. The main results were as follows:1. Effect of nitrogen nutrition on absorption and distribution of mineral material nutrition of major wheat planted in different periodThere is an obvious discrepancy of soil mineral material nutrition of wheat under nitrogen nutrition. By the creasing of nitrogen nutrition, the organic matter content and available N of soil present augmentative trend, but the available P and available K are opposite. Because the wheat growth the propulsion of the period, the nutrient in the soil presents to reduce trend; the species has no obvious difference.There is an obvious discrepancy of plant mineral material nutrition of wheat under nitrogen nutrition. By the creasing of nitrogen nutrition, the plant mineral material nutrition present augmentative trend, total N is creased and total P, total K are the highest at N1PK. By the growth going, total N and total K present: Bloom period >infuse period >maturity period, but total P present: infuse period > Bloom period >maturity period. The total K of L14 and L23 is higher, others have no obvious difference.2. Effect of nitrogen nutrition on photosynthesis system of major wheat planted in different period...