Title: Effects of Different Phosphorus, Potassium Fertilizer Combined Application on Morphology and Physiological Activity of Winter Wheat Root
Abstract: The morphology and physiological activity of winter wheat(Triticum aestivum Linn.) of Luohan No.6 at three phosphorus levels and two potassium levels were studied in pot experiment. The results showed that the counts of secondary roots,dry root weight, root volume, root activity, and soluble sugar content of root increased with the increase of phosphorus and potassium in a certain range. The effects of different phosphorus and potassium levels on morphology and physiological vigor of root were significant. The indicators of P2K2 were performed better than those of the others. The P1K1 was the worst. After flagging, the difference of the counts of secondary root was extremely significant between P2K2 and P1K1(P0.01). After grain formation, the dry weight of root and root volume per plant of P2K2 was extremely significantly greater than that of P1K1(P 0.05). At early stage, the root shoot ratio of P2K2 was significantly higher than that of P1K1. In terms of root physiological activity, the values of the root activity and root soluble sugar content of P2K2 were significantly bigger than that of P1K1(P0.05), with the values reaching maximum at jointing stage. Within a certain limit, the quality of root growth and development improved with the increase of phosphorus and potassium. When the phosphorus was deficit, the root development was improved by increasing the potassium.
Publication Year: 2015
Publication Date: 2015-01-01
Language: en
Type: article
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