Field and glasshouse experiments were conducted to study the effect of B. japonicum inoculation and phosphorus supplementation on macronutrient uptake by soybean. The treatments consisted of B. japonicum inoculation (...Field and glasshouse experiments were conducted to study the effect of B. japonicum inoculation and phosphorus supplementation on macronutrient uptake by soybean. The treatments consisted of B. japonicum inoculation (with & without), phosphorus supplementation at the levels of 0, 20, 40 and 80 kg P·ha-1. Both treatments were replicated four times in a split plot design. The macronutrients considered were N, P, K, Ca and Mg. Results showed that inoculation with B. japonicum significantly contribute to the uptake of N, P, K, Ca and Mg in roots, shoots, pods and the whole soybean plant. Likewise, phosphorus supplementation significantly enhanced the uptake of N, P, K, Ca and Mg in roots, shoots, pods and the whole plant. The use of effective strains of rhizobia and P supplementation was an effective way of enhancing the growth of soybean, eventually the uptake of macronutrients in plant organs.展开更多
以淮山为研究对象,旨在明确淮山生产中的氮钾肥适宜用量及镁硼肥配施效应,以期为高产优质淮山生产和合理施肥提供科学依据。设置3个氮肥用量水平(270、360、450 kg N/hm^2)和3个钾肥用量水平(270、360、450 kg K_2O/hm^2),研究在等量有...以淮山为研究对象,旨在明确淮山生产中的氮钾肥适宜用量及镁硼肥配施效应,以期为高产优质淮山生产和合理施肥提供科学依据。设置3个氮肥用量水平(270、360、450 kg N/hm^2)和3个钾肥用量水平(270、360、450 kg K_2O/hm^2),研究在等量有机肥(精制有机肥4500 kg/hm^2)和磷肥(144 kg P2O5/hm^2)基础上配施不同用量钾氮肥并添加镁(22.5 kg Mg/hm^2)硼(0.21 kg B/hm^2)肥对淮山叶绿素含量、生物量、品质、养分吸收量和产量的影响。研究结果表明:氮钾肥不同用量对淮山块根膨大期和收获期叶片SPAD值无显著影响。配施Mg和B明显提高淮山可溶性蛋白和氨基酸态氮含量。随施N量或施K量的增加,生产100 kg淮山N、K的需求量均呈先增加后下降趋势。在360 kg N/hm^2基础上配施450 kg K_2O/hm^2或在360 kg N/hm^2和360 kg K_2O/hm^2基础上配施22.5 kg Mg/hm^2均明显提高淮山块根重量、总生物量和淮山产量。增施钾肥和配施Mg均有利于提高淮山N和K的收获指数。为获得70000～90000 kg/hm^2的淮山产量,建议在施用4500 kg/hm^2精制有机肥、360 kg N/hm^2、144 kg P_2O_5/hm^2基础上配施450 kg K_2O/hm^2或配施360 kg K_2O/hm^2和22.5 kg Mg/hm^2。展开更多
文摘Field and glasshouse experiments were conducted to study the effect of B. japonicum inoculation and phosphorus supplementation on macronutrient uptake by soybean. The treatments consisted of B. japonicum inoculation (with & without), phosphorus supplementation at the levels of 0, 20, 40 and 80 kg P·ha-1. Both treatments were replicated four times in a split plot design. The macronutrients considered were N, P, K, Ca and Mg. Results showed that inoculation with B. japonicum significantly contribute to the uptake of N, P, K, Ca and Mg in roots, shoots, pods and the whole soybean plant. Likewise, phosphorus supplementation significantly enhanced the uptake of N, P, K, Ca and Mg in roots, shoots, pods and the whole plant. The use of effective strains of rhizobia and P supplementation was an effective way of enhancing the growth of soybean, eventually the uptake of macronutrients in plant organs.
文摘以淮山为研究对象,旨在明确淮山生产中的氮钾肥适宜用量及镁硼肥配施效应,以期为高产优质淮山生产和合理施肥提供科学依据。设置3个氮肥用量水平(270、360、450 kg N/hm^2)和3个钾肥用量水平(270、360、450 kg K_2O/hm^2),研究在等量有机肥(精制有机肥4500 kg/hm^2)和磷肥(144 kg P2O5/hm^2)基础上配施不同用量钾氮肥并添加镁(22.5 kg Mg/hm^2)硼(0.21 kg B/hm^2)肥对淮山叶绿素含量、生物量、品质、养分吸收量和产量的影响。研究结果表明:氮钾肥不同用量对淮山块根膨大期和收获期叶片SPAD值无显著影响。配施Mg和B明显提高淮山可溶性蛋白和氨基酸态氮含量。随施N量或施K量的增加,生产100 kg淮山N、K的需求量均呈先增加后下降趋势。在360 kg N/hm^2基础上配施450 kg K_2O/hm^2或在360 kg N/hm^2和360 kg K_2O/hm^2基础上配施22.5 kg Mg/hm^2均明显提高淮山块根重量、总生物量和淮山产量。增施钾肥和配施Mg均有利于提高淮山N和K的收获指数。为获得70000～90000 kg/hm^2的淮山产量,建议在施用4500 kg/hm^2精制有机肥、360 kg N/hm^2、144 kg P_2O_5/hm^2基础上配施450 kg K_2O/hm^2或配施360 kg K_2O/hm^2和22.5 kg Mg/hm^2。
