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利用根袋法研究了不同施肥条件下婆婆纳、小花糖芥、离子草三种麦田杂草根际养分状况。结果表明:无论施用N肥与否,婆婆纳比其它两种杂草有着更强地利用非根际土壤中速效N的能力;不施用P肥时,离子草比其它两种杂草有着更强地活化根际土壤中P素养分的能力;无论施用K肥与否,婆婆纳根际土壤速效K水平要明显低于其它两种杂草。因而,三种杂草中,婆婆纳更能适应低N养分土壤,离子草更能适应低P养分土壤,而小花糖芥与离子草则比婆婆纳更能适应低K养分土壤。
The rhizosphere nutrient status of weeds in three wheat fields under different fertilization conditions was studied by root bag method. The results showed that the two other weeds of Napoleon had the ability of utilizing N quickly in the non-rhizospheric soil, irrespective of whether N fertilizer was applied or not, and the ionosphere was stronger than the other two weeds To activate P nutrient in rhizosphere soil. Regardless of whether K fertilizer was applied or not, the available K level in the rhizosphere soil was lower than that of the other two kinds of weeds. Therefore, the three kinds of weeds, Veronica satisfied more suitable for low-N nutrient soil, ionospore more adapted to low-P nutrient soil, and floret mustard and Ionophylla better adapted than the low-K nutrient soil.