Chinese Journal of Applied Ecology
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GUO Yan-qing, ZHU Yu-ling, LIU Kai, PEI Shu-jun, ZHAO Bin, ZHANG Ji-wang*
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Abstract: The effects of water-potassium interaction on stalk structure and function of high-yield summer maize were studied in the waterproof cultivation pools with Zhengdan 958 (ZD958) as the experimental material. The results showed that the quantity of bleeding sap in stalk was significantly improved by irrigation. Potassium (K) application could reduce the influence of drought stress on the quantity of bleeding sap in stalk to a certain extent. The quantity of bleeding sap in stalks during different growth periods were significantly improved in the treatment of 2250 m3·hm-2 irrigation amount with K application. The stalk rind penetration strength and stem diameter were significantly improved by waterpotassium interactions. Under the irrigation amount of 2250 m3·hm-2, the stalk rind penetration strength and stem diameter with K application were respectively increased by 46.0% and 36.4% compared with no K application. Under K application, the stalk rind penetration strength and stem diameter in the irrigation amount 2250 m3·hm-2 were respectively increased by 30.7% and 8.6% compared with 450 m3·hm-2. The number, area of vascular bundle and the thickness of thickwalled cell, cortex and rind, were significantly improved by the irrigation amount 2250 m3·hm-2 with K application. In conclusion, application of 180 kg K2O·hm-2 and increasing the irrigation amount properly could increase the lodging resistance and yield of summer maize in this field experiment condition.
GUO Yan-qing, ZHU Yu-ling, LIU Kai, PEI Shu-jun, ZHAO Bin, ZHANG Ji-wang*. Effects of water-potassium interaction on stalk structure and function of high-yield summer maize.[J]. Chinese Journal of Applied Ecology.
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URL: https://www.cjae.net/EN/abstract/abstract12120.shtml
https://www.cjae.net/EN/Y2016/V27/I1/143