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利用水培试验 ,研究了 3个小麦基因型对不同形态N素吸收和积累的差异 .结果表明 ,在不同N浓度下 ,小麦对增铵营养和NH+ 4的吸收速率显著高于NO-3 营养 ,且在较高浓度下 ,增铵营养处理具有更强的吸收优势 .与次敏感型莱州 95 3和钝感型江东门相比 ,敏感型扬麦 15 8不仅具有较强的NO-3 和NH+ 4吸收能力 ,而且具有最强的增铵营养吸收能力 .增铵营养促进了扬麦 15 8和莱州 95 3对NO-3 和NH+ 4的吸收 ,但在一定程度上抑制了江东门对NO-3 的吸收 .与NO-3 营养及NH+ 4营养相比 ,增铵营养显著提高了扬麦 15 8和莱州 95 3的全株、地上部N积累量和叶片光合速率 ,而对江东门影响较小 .因此 ,增铵营养促进了植株的N吸收 ,提高了N积累和光合速率 ,从而促进了小麦生长 .
The hydroponic experiment was conducted to study the differences in the uptake and accumulation of three N genotypes among three wheat genotypes.The results showed that under different concentrations of N, the uptake rate of NH 4 + and NH 4 + in wheat was significantly higher than that of NO 3 , And at higher concentration, enhanced ammonium nutrition had a stronger absorption advantage.Compared with the secondary sensitive Laizhou 95 3 and the insensitive Jiangdongmen, the sensitive type Yangmai 15 8 not only had stronger NO-3 And NH + 4 absorption ability, but also had the strongest enhancement of ammonium nutrition absorption.Enhancing ammonium nutrition promoted the uptake of NO-3 and NH + 4 in Yangmai 15 8 and Laizhou 95 3, but inhibited the growth of Jiangdong Gate to a certain extent NO-3 uptake.Compared with NO-3 nutrition and NH + 4 nutrition, increasing ammonium nutrition significantly increased N accumulation and shoot photosynthetic rate of Yangmai 15 8 and Laizhou 95 3, East Gate had less influence.Thus, increasing ammonium nutrition promoted plant N uptake, increased N accumulation and photosynthetic rate, and promoted wheat growth.