论文部分内容阅读
用品种、氮肥、干旱胁迫3因素3水平完全均衡试验方案的盆栽试验，研究小麦吸氮量和抗旱性的氮素营养遗传特性。结果表明，小麦吸氮量具有明显的基因型差异，施氮量、干旱胁迫程度对小麦吸氮量有极显著的影响。小麦子粒、秸秆、地上部的吸氮量和相应的产量呈极显著的正相关。干旱胁迫能明显减少小麦的吸氮量，且减少的程度因品种不同而异。基因型差异对小麦吸氮量的效应又受氮肥用量的影响。在正常供水和干旱下．小麦子粒和秸秆的吸氮量随氮肥使用量、基因型差异而不同。在轻度干旱条件下，选用中抗品种和中等氮肥水平（如W2V2N1）组合，子粒产量和吸氮量最大；而在正常供水时，选用正常或低抗品种和高氮量水平（如W1V2N2或W1V3N1）组合较好。
Pot experiments were conducted to study the nitrogen nutrition genetic characteristics of nitrogen uptake and drought resistance in wheat using nitrogen and nitrogen fertilization and three factors and three levels of drought stress. The results showed that there was a significant genotypic difference in nitrogen uptake by wheat. Nitrogen application and drought stress had a very significant effect on nitrogen uptake by wheat. There was a significant positive correlation between the nitrogen uptake of wheat grain, straw and shoots and the corresponding yield. Drought stress can significantly reduce the nitrogen uptake of wheat, and the degree of reduction varies with the variety. The effect of genotypic differences on nitrogen uptake by wheat was influenced by nitrogen application. Under normal water supply and drought. The nitrogen uptake of wheat grains and straw varies with the amount of nitrogen fertilizer used and the genotype differences. Under mild drought conditions, the combination of medium and medium nitrogen levels (such as W2V2N1) was used to select the best combination of grain yield and nitrogen uptake. In the normal water supply, normal or low resistant varieties and high nitrogen levels (such as W1V2N2 or W1V3N1) is better.