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Acta Agron Sin ›› 2014, Vol. 40 ›› Issue (04): 667-677.doi: 10.3724/SP.J.1006.2014.00667

• TILLAGE & CULTIVATION·PHYSIOLOGY & BIOCHEMISTRY • Previous Articles     Next Articles

Effect of Ridge & Terraced Cultivation on Rice Yield and Root Trait

ZHENG Hua-Bin1,2,YAO Lin2,3,LIU Jian-Xia2,3,HE Hui2,3,CHEN Yang,HUANG Huang1,2,*   

  1. 1 College of Agronomy, Hunan Agricultural University, Changsha 410128, China; 2Observation Station of Crop Cultivation Science in Central China, Ministry of Agriculture, Changsha 410128, China; 3 College of Bio-science & Technology, Hunan Agricultural University, Changsha 410128, China
  • Received:2013-03-22 Revised:2014-01-12 Online:2014-04-12 Published:2014-02-14
  • Contact: 黄璜, E-mail: hh863@126.com

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Abstract:

A field experiment was conducted in Changsha city of Hunan Province in 2011 and 2012 to find out a cultivation technique of ridge & terraced cultivation (RTC) for improving rice yield and root trait. Super hybrid rice Yliangyou 1, hybrid rice Shanyou 63 and conventional rice Huanghuazhan were used in the mid-rice season. The cultivation patterns were designed as ridge & terranced cultivation (T1, ridge width 60 cm; T2, ridge width 120 cm), bed cultivation (T3, bed width 70 cm; T4, bed width 140 cm; T5, bed width 230 cm), and traditional cultivation (T0). The characteristics of grain yield formation and root character under different cultivation patterns were analyzed. Results showed that ridge & terraced cultivation (T1) and bed cultivation (T3) could increase grain yield compared with traditional cultivation (T0), T1 had the highest yield, which was 22.2% (17.1%–27.2%) higher than that of T0, the next was T3, with the yield 10.4% (5.8%–15.0%) higher than that of T0. However, increasing range of yield declined gradually with the increase of ridge width or bed width. The important reason for increasing yield by using the two cultivation techniques was higher effective panicles and spikelets per panicles, better root trait (root oxidation ability, root surface absorption area and soil porosity) and higher dry matter accumulation after full heading stage. Meanwhile, root anatomical structureshowed that the thickness of root cortex was decreased and the size of root vascular cylinder and vessel areas was increased in RTC, so that the capacity of water absorption was enhanced.

Key words: Planting pattern, Cultivation model, Bed cultivation, Ridge width, Bed width.

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