| 罗来超,吕静霞,魏 鑫,苗艳芳，李 娜,李生秀，都开彬.氮肥形态对小麦不同生育期土壤酶活性的影响[J].干旱地区农业研究,2013,31(6):99~102 |
| 氮肥形态对小麦不同生育期土壤酶活性的影响 |
| Effects of nitrogen fertilizer forms on soil enzyme activities at different growth stages of wheat |
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| DOI：10.7606/j.issn.1000-7601.2013.06.018 |
| 中文关键词: 氮肥形态 冬小麦 土壤酶活性 旱地 |
| 英文关键词:nitrogen fertilizer form winter wheat soil enzyme activity dryland |
| 基金项目:国家自然科学基金项目(30971866)；洛阳市科技攻关项目(1203206B) |
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| 中文摘要: |
| 采用田间试验与室内分析相结合的方法，研究了氮肥形态对小麦不同生育期土壤酶活性的影响。结果表明： 脲酶、蛋白酶活性随小麦生育时期推进呈现出两个峰值，蔗糖酶先降后升再降，呈倒‘S’型曲线，脱氢酶在越冬、成熟期高，其它生育期低，曲线似‘U’型，过氧化氢酶活性在返青后呈急剧上升，拔节后缓降。0～20 cm酶活性普遍高于20～40 cm；施肥可以提高土壤酶活性，可使脲酶活性提高60.3%，蛋白酶活性平均提高36.0%，蔗糖酶活性平均提高36.7%，脱氢酶活性平均提高100%，过氧化氢酶平均提高33.8%；土壤酶活性变异系数的平均值大小顺序是：脲酶＞脱氢酶＞蛋白酶＞蔗糖酶＞过氧化氢酶；氮肥形态对小麦不同生育期5种土壤酶的影响各异，没有一定的规律性
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| 英文摘要: |
| A field experiment was carried out to study the effects of nitrogen (N) fertilizer forms on soil enzyme activities at different growth stages of wheat. The results showed, during the whole growing season of wheat, the activities of urease and protease presented a two peak curve, while the activities of invertase, dehydrogenase and catalase demonstrated an inverted S-curve (i.e., decreasing-rising-decreasing), U-curve (i.e., being high at overwintering and maturity stage but low at other stages), and inverted L-curve (i.e., being risen sharply after reviving stage but decreased slowly after jointing stage), respectively. The enzyme activities in 0～20 cm layer of soil were g
enerally higher than those in 20～40 cm layer. N application significantly improved soil enzyme activities, in which the activities of urease, protease, invertase, dehydrogenase and catalase were elevated by 60.3%, 36.0%, 36.7%, 100% and 33.8% on average, respectively. The average values of coefficient of variation of soil enzyme activities were sequenced as: urease > dehydrogenase > protease > invertase > catalase. The effects of N fertilizer forms to soil enzyme activities
at different stages of wheat were different, but there was no definite regularity. |
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