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Title of Journal: Nutr Cycl Agroecosyst

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Abbravation: Nutrient Cycling in Agroecosystems

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Springer Netherlands

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DOI

10.1007/s10825-008-0176-8

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1573-0867

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Superscript15/SuperscriptN tracer technique an

Authors: Feng Jiao Jinhua Wu Lihe Yu Richang Zhai
Publish Date: 2013/06/21
Volume: 95, Issue: 3, Pages: 345-351
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Abstract

Field experiments using the potato variety Kexin No 13 were carried out on calcic chernozem soils in western Songnen Plain China The accumulation absorption ratio and distribution of nitrogen15 isotope 15N as well as the nitrogen N fertiliser utilisation rate in the potato plants were examined by the 15N tracer technique The results revealed that the N contents of the aboveground parts tuber and roots of the potatoes increased with increased N fertiliser application The potato yield also gradually increased with increased N application In the 15N microplot experiment with 90 kg hm−2 pure N treatment the N fertiliser and soil N absorbed by the potato plants accounted for 17–29 and 71–83  of the total N respectively The N fertiliser and soil N absorbed by the potato plants were 019–058 and 045–274 g plant−1 respectively The 15N fertiliser utilisation rate of whole potato plant was 10–32  and was relatively low at the early stage Soil N was an important N source at both early and late growth stages of the potato plants

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  8. Crop response of aerobic rice and winter wheat to nitrogen, phosphorus and potassium in a double cropping system
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