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Chinese Agricultural Science Bulletin ›› 2015, Vol. 31 ›› Issue (27): 224-228.doi: 10.11924/j.issn.1000-6850.casb15030151

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Study on Soil Temperature Variation of No-till Cultivation with Different Amounts of Stalk Mulch

张敬涛,刘婧琦 and 赵桂范   

  • Received:2015-03-18 Revised:2015-04-17 Accepted:2015-05-15 Online:2015-09-23 Published:2015-09-23

Abstract: Micro area locating method was used in order to study the effect of different amounts of stalk mulch on soil temperature in no-till soybean field. The results indicated that: with the increase of the amount of stalk mulch, the soil temperature decreased. Compared to the control of 0% stalk mulch conventional fall ploughing ridge culture, the soil temperature of no-till treatments with 0%, 30%, 60%, 100% stalk mulch decreased by 0.35-4.39, 0.45-4.55, 0.57-5.34 and 0.77-6.14℃ respectively. Among different growth stages, seedling stage had the biggest temperature difference compared to the control, and the difference became small after bloom. The temperature drop range was 0.46-3.62℃ between different soil layers, seedling stage had the largest drop range of 3.62℃. Therefore, the key of stalk returning no-till technique application in the high latitude cold region was adopting temperature increase measures at the seedling stage in order to promote seedling growth.