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采用田间试验方法 ,在不施肥与施肥条件下 ,比较了耐低NPK养分的高、中、低效基因型小麦的光合能力差异。结果表明 ,耐低NPK养分的高效基因型在不施肥条件下的叶面积指数、光合势和作物生长率较高 ,相对叶面积指数、相对光合势、相对净同化率和相对作物生长率亦较高 ;低效基因型正相反。相关分析表明 ,小麦相对产量与相对叶面积指数、相对光合势、相对净同化率和相对作物生长率呈显著正相关。因此 ,耐低NPK养分的高效基因型在不施肥或少施肥条件下光合能力较强 ,可获得较高的产量 ;低效基因型在足肥条件下具有较高的光合性能 ,能获得较高的产量 ;中效基因型介于二者之间
Field experiments were conducted to compare the photosynthetic abilities of high, medium and low-efficiency wheat genotypes with low NPK nutrition without fertilizers and fertilizers. The results showed that the leaf area index, photosynthetic potential and crop growth rate of high efficient genotypes with low NPK fertility were higher than those without fertilization. Relative leaf area index, relative photosynthetic potential, relative net assimilation rate and relative crop growth rate were also higher High; inefficient genotypes are the opposite. Correlation analysis showed that there was a significant positive correlation between relative yield of wheat and relative leaf area index, relative photosynthetic potential, relative net assimilation rate and relative crop growth rate. Therefore, the high efficient genotypes with low NPK fertility had higher photosynthetic ability under no fertilization or less fertilization, and higher yield could be obtained. The low efficient genotypes had higher photosynthetic ability under the condition of sufficient fertilizer, Of the yield; medium efficiency genotype in between the two