| 氮素对大葱产量影响和氮素供应目标值的研究 |
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| 引用本文： | 江丽华,刘兆辉,张文君,陈清,郑福丽,王梅,林海涛. 氮素对大葱产量影响和氮素供应目标值的研究[J]. 植物营养与肥料学报, 2007, 13(5): 890-896. DOI: 10.11674/zwyf.2007.0520 |
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| 作者姓名： | 江丽华 刘兆辉 张文君 陈清 郑福丽 王梅 林海涛 |
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| 作者单位： | 1.山东省农科院土壤肥料研究所 山东济南250100; |
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| 基金项目： | 引进国际先进农业科技计划(948计划) |
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| 摘 要： | 在山东省章丘大葱高产地块,设置不同氮肥处理,研究了施肥对章丘长白大葱产量的影响以及该条件下土壤氮素平衡。结果表明,在磷、钾肥供应充足的前提下,随氮肥用量增加大葱的产量逐渐增加,增产率在37.2%～60.1%;当氮肥用量为360.kg/hm2时,产量接近最高。随着氮肥用量的增加,土壤的残留Nmin量增加。6个处理土壤中残留N分别为42.82、55.24、67.62、91.91、123.72和219.22.kg/hm2。在大葱的整个生长季,土壤有机氮表观矿化量为N.35.11.kg/hm2,有机肥净矿化量为N.43.51.kg/hm2。在大葱缓苗越夏期、旺盛生长期和假茎充实期,氮素的供应目标值分别为38.05、196.20和233.22.kg/hm2,表明在本试验条件下大葱氮肥后移,对提高大葱产量和氮肥利用率都具有重要意义。虽然本试验中大葱氮肥利用率较低,仅为12.72%～35.36%,但单位氮素投入所获得的收益很高。施氮量为120.kg/hm2时,每投资1元钱的氮肥可获得23.91元的收益,即使施氮量达到480.kg/hm2时,氮肥的产投比也达到9.05元。
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| 关 键 词： | 大葱 产量 氮素供应目标值 有机氮矿化 |
| 文章编号： | 1008-505X（2007）05-0890-07 |
| 收稿时间： | 2006-06-26 |
| 修稿时间： | 2006-10-12 |
Study on the effect of nitrogen on green Chinese onion yield and N supplying target value |
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| JIANG Li-hua,LIU Zhao-hui,ZHANG Wen-jun,CHEN Qing,ZHENG Fu-li,WANG Mei,LIN Hai-tao. Study on the effect of nitrogen on green Chinese onion yield and N supplying target value[J]. Plant Nutrition and Fertilizer Science, 2007, 13(5): 890-896. DOI: 10.11674/zwyf.2007.0520 |
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| Authors: | JIANG Li-hua LIU Zhao-hui ZHANG Wen-jun CHEN Qing ZHENG Fu-li WANG Mei LIN Hai-tao |
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| Affiliation: | 1.Soil and Fertilizer Institute.Shandong AAS;Jinan 250100;China; |
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| Abstract: | An experiment was conducted in Zhangqiu county of Shandong province,which is a famous region for green Chinese onion production.The experiment had 6 N treatments to study its effect on green Chinese onion yield and N supplying target value.Green Chinese onion yield increased with N fertilizer rate when enough P and K fertilizers were applied.The increment was 37.2`.08%.The yield was highest at N 360 kg/ha.The residue N in soil increased also with increasing N application rate.The amount of surplus N of the 6 treatments in soil was 42.82,55.24,67.62,91.91,123.72 and 219.22 kg/ha,separately,presenting a serious concern for underground water pollution.The amount of apparent mineral N of soil and apparent mineral N of the organic manure were 35.11 and 43.51 kg/ha during all stage of green Chinese onion.Recovery of N fertilizer was 12.72%-35.36%.The output/input of N fertilizer was 23.91 for treatment MN1 and 9.05 for treatment MN4.The N supplying target values were N 38.05,196.20 and 233.22 kg/ha in slow growth stage,fast growth stage and cauloid inflating stage,respectively.It is very important to pay attention to yield,quality,environment and profit for green Chinese onion fertilization. |
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| Keywords: | green Chinese onion yield target value of N supply nitrogen mineralization |
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