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- W2362127761 abstract "The results of long term experiment started in 1984 show that:soil potential can be enhance effectively after continuous planting crops, and their elevation range from 6.88% to 36.58%; the highest increment of crops is purple alfalfa, and its soil potential is 1.37 multiples of bareness dispose. Long term fertilization (nitrogenous fertilizer、phosphorescence、organism fertilizer) can increase soil potential and organic fertilizer has the best effect. After long term fertilization, the N supply by soils were elevated from 9.8% to 133.98% and the best effect of crops is continuouslg planting maize, and its soil potential is 2.34 multiples of bareness dispose. Among long term rotation dispose, N supply by soils of the 3 year grain forage rotation is the greatest, and its amount add up to 156.4 kg/hm 2. The results also reflect that the rotation of grain pasture (sainfoin、purple alfalfa) has the better increment than rotation of grain legumine. Planting crop can raise the content of organic N and also N 0. Long term application of organic fertilizer can enhance N 0 better than other chemical fertilizers. The N supply by soils in soil profile decreased rapidly at 100 cm." @default.
- W2362127761 created "2016-06-24" @default.
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- W2362127761 date "2000-01-01" @default.
- W2362127761 modified "2023-09-25" @default.
- W2362127761 title "Effects of long term rotation and fertilization on N supply by soil in dryland area on loess plateau" @default.
- W2362127761 hasPublicationYear "2000" @default.
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