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- W2371016771 abstract "Potassium(K) balance in purple soil rice field ecosystem under rice-wheat rotation were studied on the National Purple Soil Fertility and Fertilizer Efficiency Monitored Base.The results indicated that application and crop harvesting were major ways of K input and output,respectively,and percolation loss was a non-neglectful way of K output.Except for the MNPK treatment,soil K was deficient in other treatments after a rotation of rice and wheat.Therefore,7500 kg straw hm~(-2)a~(-1) combination with 140kg K_2O hm~(-2)a~(-1) was an essential means to sustain purple soil K fertility.K residual rate in all treatments were about 10 %.K residual amount was the highest(23.146 kg K_2O hm~(-2)a~(-1)) in the MNPK treatment and was the lowest(9.27 kg K_2O hm~(-2)a~(-1)) in CK,and were higher in the applying K treatments than that in the non-applying K treatments." @default.
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- W2371016771 date "2004-01-01" @default.
- W2371016771 modified "2023-09-26" @default.
- W2371016771 title "Studies on Potassium balance in purple soil rice field ecosystem" @default.
- W2371016771 hasPublicationYear "2004" @default.
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