| 万书勤,康跃虎,刘士平.华北平原滴灌条件下土壤水势对萝卜生长的影响[J].干旱地区农业研究,2005,(1):16~27 |
| 华北平原滴灌条件下土壤水势对萝卜生长的影响 |
| Effects of soil water potential on radish growth under drip irrigation in North China Plain |
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| DOI：10.7606/j.issn.1000-7601.2005.01.04 |
| 中文关键词: 滴灌 土壤水势 萝卜 华北平原 |
| 英文关键词:drip irrigation soil water potential radish North China Plain |
| 基金项目:国家杰出青年科学基金(40125002)； 国家自然科学基金(40071020) |
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| 中文摘要: |
| 通过控制滴灌滴头下20 cm深处土壤水势下限(-15kPa,N1;-25kPa,N2;-35kPa,N3;-45kPa,N4;-55kPa,N5),研究了不同处理土壤水势随时间和空间的变化规律,以及不同土壤水势处理对萝卜叶面积指数、叶绿素含量、周径膨大、干重积累等生长参数的影响,并对各处理间产量、水分利用效率进行了比较,发现在华北平原下半年降雨较多的情况下种植秋萝卜:(1)不同土壤水势处理对萝卜的生长发育没有明显影响;(2)不同处理水分利用效率不同:N5>N4>N3>N2>N1;(3)滴灌条件下,不同土壤水势处理萝卜的平均重量和产量都高于地面灌溉。 |
| 英文摘要: |
| The temporal and spatial changes of soil water potentials with different treatments and the effects of the treatments of different soil water potentials on LAIs, leaf chlorophyll contents, circumferences and dry matter accumulation of radish were studied; The yields and water use efficiency with different treatments were compared. The results showed that in planting radish in the frequently-raining second half of a year, (1) the treatments of different soil water potentials did not significantly affect radish growth; (2) the treatments of different soil water potentials had different water use efficiencies which could be ranked in the order of N5＞N4＞N3＞N2＞N1 from high to low, and (3) the weights per radish and yields with the treatments of different soil water potentials under drip irrigation were higher than those in surface irrigation. |
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