小麦籽粒营养品质及品质产量的边际效应

为阐明小麦籽粒营养品质及品质产量的边际效应，以黄淮麦区不同品质类型的4个小麦品种为材料，于2010-2012年度对不同麦行籽粒蛋白质、淀粉、可溶性糖含量等营养品质指标和品质产量进行了系统研究。结果表明,不同行次间籽粒蛋白质含量和可溶性糖含量差异达显著水平，其中边1行、边2行、边3行和边4行的籽粒蛋白质含量分别为136.79、131.02、129.50、126.58 mg·g^-1，可溶性糖含量分别为113.08、91.61、93.55、87.91 mg·g^-1；不同行次间籽粒淀粉含量差异达显著水平；不同行次间籽粒蛋白质产量和淀粉产量的差异达显著水平，其中，边1行、边2行、边3行和边4行的籽粒蛋白质产量和淀粉产量分别为1 543.3、995.7、987.1、930.9 kg·hm^-2和6 480.6、4 284.9、4 383.6、4 126.3 kg·hm^-2，边际效应显著。本研究表明，小麦营养品质和品质产量具有显著的边际效应，生产中可通过改革种植方式、合理选用品种等加以充分利用。

Analysis on Marginal Effects of Grain Nutritional Quality and Quality Yield in Wheat (Triticum aestivum L.)

Field experiments were conducted to understand the marginal effect on grain nutritional quality and quality yields of wheat varieties in Huanghuai Plain from 2010 to 2012. The protein content, starch content, soluble sugar and other nutrient quality indexes of grains were performed. The results indicated that there were significant differences existed in grain protein content and soluble sugar content in various rows; the grain protein content was 136.80,131.03, 129.51 and 126.58 g·kg^-1, and the soluble sugar content was 113.08, 91.618, 93.55 and 87.91 g·kg^-1 for the grains in the row 1, row 2, row 3 and row 4, respectively. Grain starch content, grain protein yield and starch yield were all significantly different in different rows, the grain protein yield was 1 543.3, 995.7, 987.1 and 930.9 kg·ha^-1, the starch yield was 6 480.6, 4 284.9, 4 383.6 and 4 126.3 kg·ha^-1 for the grains in the row 1, row 2, row 3 and row 4, respectively. The results indicated there was obvious marginal effect, and the marginal effects could be well explored in agricultural production through reforming planting methods and selecting wheat varieties.