Potato-Cabbage Double Cropping Effect on Nitrate Leaching and Resource-Use Efficiencies in an Irrigated Area

HU Bo; FAN Ming-Shou; HAO Yun-Feng; ZHANG Jian-Hua

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Potato-Cabbage Double Cropping Effect on Nitrate Leaching and Resource-Use Efficiencies in an Irrigated Area

机译：马铃薯白菜双作对灌区硝酸盐淋失和资源利用效率的影响

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To reduce the nitrate leaching risk after potato (Solanum tuberosum L.) harvest and improve nitrogen fertilizer-use efficiency,a potato-cabbage double cropping system (DCS) was established at Hetao,North China,an arid area with irrigated land.A two-year field experiment demonstrated that planting early-maturing potato cultivar under plastic mulch shortened its growth period by 14 d and allowed a second crop of cabbage to scavenge the soil residual NO3--N to a depth of 160 cm,substantially reducing the risk of nitrate leaching into groundwater. The yearly total N uptake in DCS was about 110 kg ha-1 more than that in the conventional cropping system (CCS),i.e.,mono potato planting.This accounted for apparent nitrogen recovery (ANR) improvement of 16.90％-26.57％ in the DCS as compared to that in the CCS for both years.As a result,the soil residual NO3--N in the 0-160 cm soil profile in the DCS was lower than that in the CCS.The solar energy-use efficiency and soil-use efficiency were also substantially increased with DCS.

机译：为了降低马铃薯（Solanum tuberosum L.）收获后硝酸盐浸出的风险并提高氮肥的利用效率，在华北干旱带灌溉土地的河套地区建立了马铃薯白菜双作系统（DCS）。一年的田间试验表明，在塑料覆盖下种植早熟马铃薯品种可将其生育期缩短14 d，并允许第二轮甘蓝作物清除土壤残留NO3--N深度达160 cm，从而大大降低了马铃薯播种的风险。硝酸盐渗入地下水。 DCS的年总氮吸收量比传统种植系统（CCS）（即单马铃薯种植）高出110 kg ha-1，这导致了表观氮素回收（ANR）提高了16.90％-26.57％。 DCS与CCS相比，这两年，因此DCS在0-160 cm土壤剖面中的土壤残留NO3--N低于CCS。太阳能利用效率和土壤DCS的使用效率也大大提高。

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《土壤圈（英文版）》 |2012年第6期|842-847|共6页
作者
HU Bo; FAN Ming-Shou; HAO Yun-Feng; ZHANG Jian-Hua;
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作者单位

College of Agronomy, Inner Mongolia Agricultural University, Hohhot 010019(China);

College of Agronomy, Inner Mongolia Agricultural University, Hohhot 010019(China);

Bayannur City Agriculture Science Institute, Bayannur 015400(China);

School of Life Sciences and State Key Laboratory of Agrobiotechnology, The Chinese University of Hong Kong, Hong Kong(China);

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收录信息中国科学引文数据库(CSCD);中国科技论文与引文数据库(CSTPCD);
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Potato-Cabbage Double Cropping Effect on Nitrate Leaching and Resource-Use Efficiencies in an Irrigated Area

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