核农学报2012，Vol.26Issue(9)：1326-1332,7.
根系交互作用对等高绿篱-大豆间作系统N素吸收转移的影响
EFFECT OF ROOT CONTACT ON N UPTAKE DISTRIBUTION IN INTERCROPPED SOYBEAN AND HEDGEROW
摘要
Abstract
Below-ground for nutrients and water can be clue to the cause of the reduction of crops yields. Root interaction plays on important role in estimating the effect of below-ground competition. However, little information has been known about these hedgerows-crops interaction in contour hedgerow agroforestry. Pot experimenls were conducted to study the effect of root contact on N absorption and transfer in purple soil of two hedges-soybean intercropping systems with two different methods of^15N foliar-feeding and^15N soil labeling methods, along with root partition, i. e. , a sheet barrier treatment, a mesh barrier, and no barrier treatment. Results showed that the growth of Amorpha. fruticosa was suppressed without root barrier, leading to lower biomass and N acquisition than those with mesh and sheet barrier; the biomass and N acquisition of Vertiveria zizanioides and soybean without root barrier were the highest in Vertiver intereropping system. The ^15N abundance is higher in soybean and A. futisoca with mesh barrier, but ^15N abundance is higher in Vertiver without root barrier, which suggested that the Vertiver is a stronger competitor in Vertiver/soybean intercropping system. N transfer from soybean to hedge species was obvious using ^15N direct labeling methods, which suggested that competition between of A. futisoca or Vertiver for nitrogen fertilizer was stronger. Interspecific inhibition did exist in A. futisoca-soybean intercropping, and the growth of A. futisoca and soybean were suppressed ; the complementary nitrogen use did exist in Vertiver-soybean intercropping, and both competition and facilitation occurred in Vertiver-soybean intercropping which enhanced the growth of Vertiver and soybean.关键词
绿篱/大豆/间作/根系/氮/^15NKey words
hedge/soybean/intercrops/root/nitrogen/^15N分类
农业科技引用本文复制引用
郭忠录,钟诚,王中敏,蔡崇法..根系交互作用对等高绿篱-大豆间作系统N素吸收转移的影响[J].核农学报,2012,26(9):1326-1332,7.基金项目
国家自然科学基金 （）
