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999 _c63480
_d63472
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005 20210312225942.0
008 201118s2020||||xxk|||p|op||||00||0|eng|d
022 _a2048-3694 (Online)
024 8 _ahttps://doi.org/10.1002/fes3.187
040 _aMX-TxCIM
041 _aeng
100 0 _aHuaxin Gao
_919075
245 1 0 _aYield and nitrogen uptake of sole and intercropped maize and peanut in response to N fertilizer input
260 _aUnited Kingdom :
_bWiley,
_c2020.
500 _aPeer review
500 _aOpen Access
520 _aChinese agriculture needs to become less dependent on fertilizer inputs to enhance sustainability. Cereal/legume intercropping is a potential pathway to lower fertilizer inputs, but there is insufficient knowledge on the nitrogen (N) response in species mixtures. Here, we investigated N response in maize/peanut intercropping. Maize showed a stronger yield response to N input than peanut both in sole cropping and in intercropping, and so did sole crops relative to intercrops. Maize yield was the highest at the maximum level tested: 360 kg N/ha. Agronomic efficiency (AE) of sole maize was 7.8 kg/kg N input, averaged across five N levels (0, 90, 180, 270, and 360 kg/ha). Partial land equivalent ratios (pLERs) for maize decreased with N input, from 0.70 at zero to 0.64 at 360 kg/ha. Sole peanut showed an optimum yield response to N input, with the highest yield at 270 kg/ha and lower yield at 360 kg/ha. The average AE of sole peanut was 1.3 kg/kg. The pLER of peanut declined from 0.43 at zero to 0.32 at 360 kg/ha while the overall LER decreased from 1.13 to 0.96, indicating relative better performance of intercropping at low than at high N input. Apparent recovery (RE) for N was 27.2% for sole maize, 12.4% for sole peanut, and 7.2% for intercrops. Mean N uptake was 179 kg/ha in sole maize, 199 kg/ha in intercropping, and 264 kg/ha in sole peanut. Partial economic budgeting indicated that with the current low Chinese N fertilizer prices, gross margin is maximized with high N input in sole crops; however, for intercropping, the highest gross margin was attained at intermediate N inputs of 180 or 270 kg/ha. Fertilizer price incentives may facilitate a transition to intercropping at moderate N input in China.
546 _aText in English
650 7 _aIntercropping
_2AGROVOC
_96135
650 7 _aLand equivalent ratio
_2AGROVOC
_910878
650 7 _aNitrogen
_2AGROVOC
_92912
650 7 _aYields
_2AGROVOC
_91313
700 0 _aWeiwei Meng
_919076
700 0 _aChaochun Zhang
_919077
700 1 _avan der Werf, W.
_919078
700 0 _aZheng Zhang
_919079
700 0 _aWan Shubo
_917859
700 0 _aFusuo Zhang
_919080
773 0 _gv. 9, no. 1, e187
_dUnited Kingdom : Wiley, 2020.
_tFood and Energy Security
_x2048-3694
_w10282225
856 4 _yClick here to access online
_uhttps://doi.org/10.1002/fes3.187
942 _cJA
_n0
_2ddc