作物生长期间土壤可矿化氮的变化规律研究 |
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引用本文: | 王成,王钊英,李世清,强红妮,田新玲,钟彦龙. 作物生长期间土壤可矿化氮的变化规律研究[J]. 新疆农业科学, 2003, 40(5): 320-323 |
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作者姓名: | 王成 王钊英 李世清 强红妮 田新玲 钟彦龙 |
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作者单位: | 新疆农科院测试中心,新疆乌鲁木齐,830000;新疆农科院国际合作交流处,新疆乌鲁木齐,830000;西北农林科技大学资环学院,陕西杨凌,712100 |
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摘 要: | 在陕西杨凌中等肥力红油土上安排大田试验,定期分层采取土样,测定土壤可矿化氮和生物体氮,研究作物生长期间田间土壤可矿化氮的变化及其与生物体氮的关系.结果表明,土壤可矿化氮的分布具有明显的层次性,耕层高、下层少;土壤可矿化氮呈显著的阶段性变化,作物生长前期,含量低而稳定,后期显著增加,是前期的2倍;土壤可矿化氮不因施氮而减或增加,但在施有机肥的后期则显著增加;作物种类与种植与否对可矿化氮的影响较小;可矿化氮和生物体氮之间不仅无密切相关关系,前者仅为后者的12.0;.因此,难以用生物体氮的多少反映土壤供氮能力.
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关 键 词: | 田间土壤 可矿化氮 生物体氮 作物 |
文章编号: | 1001-4330(2003)05-0320-04 |
收稿时间: | 2003-05-25 |
修稿时间: | 2003-04-02 |
Study on the Variety of Mineralize-nitrogen During the Crop Growing in the Soil |
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Abstract: | By the field experiment in moderate fertilizer red-soil of Yangling, we took some soil samples periodical and laying, then determined the contents of Mineralize-nitrogen and Organism-nitrogen in the soil, the Variety of mineralize-nitrogen and the relation of mineralize-nitrogen and organism-nitrogen during the Crop growing were studied. The results showed the distribution of mineralize-nitrogen had obvious depth: the contents were higher at plough layer and lower at underlaying. The stage variety of mineralize-nitrogen was conspicuous .The contents were low and stability in prophase during the crop growing ,but outstanding raise in anaphase (even measure up to 2 times contents of prophase's). nitrogen manure had not positive influences to mineralize-nitrogen in the soil, but organic manure had marked increase in anaphase. The kind of crop had little influence. mineralize-nitrogen and organism-nitrogen in the soil had not only no closely dependence relation, but also the contents were indifferent(the contents of Mineralize-nitrogen were only 12.0% of organism-nitrogen's). Wherefore , it was difficult to reflect the provide ability of nitrogen by the contents of mineralize-nitrogen in the soil. |
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Keywords: | the field soil mineralize-nitrogen organism-nitrogen crop |
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