| 免耕秸秆覆盖对玉米根系的影响 |
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| 引用本文： | 罗守德,董竹蔚.免耕秸秆覆盖对玉米根系的影响[J].山西农业科学,1993,21(1):14-18. |
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| 作者姓名： | 罗守德 董竹蔚 |
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| 摘 要： | 免耕秸秆覆盖对玉米的根系数量和伸展范围有明显的影响,各生育阶段分布在土壤的根量,特别是土壤下层根含量明显多于传统耕作(对照)。苗期:根量比对照多18.5%,根下扎土壤深度比对照多20cm,土壤下层根含量占总根量的21.3%,对照则无下层根。孕穗期:根量超过对照49.1%,根下扎深度比对照多10cm,土壤下层根含量比对照多7.9个百分点。开花期:根量超过对照38.3%,根下扎深度比对照多20cm,土壤下层根含量比对照多8.7个百分点。灌浆期:根量超过对照32.9%,下层根含量比对照多9.1个百分点。另外,根体积、伤流量等都超过对照。
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| 关 键 词： | 免耕 秸秆覆盖 根系 玉米 |
The Affection on Root System of Maize with Untilled and Covered Stalk Cultivation |
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| Abstract: | The cultivation untilled and covered with the whole plant stalk has more obviously affection on quantities and stretch range of maize roots than traditional cultural methods.On each stage of de- velopment,the root quantities distributed in soil all overtake the checks,especially those distributed in underlayer soil.At seedling stage,root quantities untilled and covered with stalks are more 18.5% than checks,the underground depth into which roots grow is more than 20cm than checks,and root quantities in the underlayer take 21.3% of total root quantities in contrast with 0% of checks.At booting stage,the total root quantities are more 49.1%,root depth more 10cm and underlayer root quantities more.7.9%.At flowering stage,those are more 38.3%,20cm and 8.7% respectively. During filling period,total and underlayer root quantities are more 32.9% and 9.1%。Moreover, root volume,root density and wound flow all overtake checks. |
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| Keywords: | Untill Stalk cover Root system Maize |
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