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Acta Prataculturae Sinica ›› 2012, Vol. 21 ›› Issue (6): 123-129.

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Effect of nitrogen application on the absorption of calcium, magnesium and sulfur in Wancao 2 and Zea mexicana

ZHANG Xiao-yan1, WANG Li-li1, ZHU Jian-hua1, DONG Shu-ting2, LIU Feng1   

  1. 1.S & T Information Engineering Research Center, Shandong Academy of Agricultural Sciences, Jinan 250100, China;
    2.Key Laboratory of Crop Biology of Shandong Province/ Agronomy College, Shandong Agricultural University, Taian 271018, China
  • Received:2011-11-25 Online:2012-06-25 Published:2012-12-20

Abstract: To study the effect of nitrogen application on the absorption of mineral elements in Wancao 2 and Zea mexicana, the content, accumulation rate and output of calcium, magnesium and sulfur in different organs were analyzed. The contents of Ca, Mg and S in Wancao 2 and Z. mexicana were the highest under N1 treatment (300 kg/ha, as base fertilizer). The contents of Ca and S in leaves were higher than those in stalk, while the content of Mg in stalk was higher than that in leaves. The contents of mineral elements in the first harvest of Wancao 2 were higher than those in Z. mexicana. The accumulation rate and amount of Ca, Mg and S in single plants of Z. mexicana were significantly higher than those of Wancao 2, while their accumulation rate declined gradually in aftergrass (growth after the first cut). The output of the three mineral elements in Wancao 2 was significantly higher than that in Z. mexicana. Seperate applications of nitrogen fertilizer increased the output of mineral elements in Wancao 2 compared with total application as base fertilizer. The regression analysis showed that the order of the three mineral elements influencing biomass of Wancao 2 was Ca>S>Mg, while for Z. mexicana it was S>Mg>Ca. The biomass of single plants increased with an increase in the mineral element contents in both herbages. Briefly, a total application of 300 kg/ha nitrogen as base fertilizer should lead to higher mineral nutrition in forages.

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