Effects of direct sowing cultivation on the rhizosphere of lowland rice
Effects of direct sowing cultivation on the rhizosphere of lowland rice
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直播栽培对低地水稻根际的影响
DOI：
10.1080/00380768.1982.10432434
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发表时间：
1982
影响因子：
2
通讯作者：
Y. Takai
中科院分区：
文献类型：
--
作者：
M. Kimura;H. Wada;Y. Takai
本文报道了直播栽培对低地水稻根际的影响，并与移栽栽培作了比较。将盆中的水稻土（种植或非种植）在高地条件下保持20、40或60天，然后转向浸没条件以获得不同程度的还原。在播种后0、20、40、60、80和100天连续测定根际和非根际土壤Eh、Fe ~（2+）、糖含量和微生物。同时，将冠根从主茎上按每个“茎单元”分离。在200-400倍显微镜下观察了冠根表面铁氧化物的沉淀、细菌和禾谷多粘菌样生物的定殖。获得的结果如下。1)在非根际土壤中，淹水时间越早，土壤还原性越强。而根际土壤含水量的减少则是由于土壤含水量的增加。
Abstract This report describes the effects of direct sowing cultivation on the rhizosphere of lowland rice compared with tbose of transplanting cultivation. Paddy soils in pots (planted or non-planted) were kept under upland conditions for 20, 40 or 60 days and then turned to submerged conditions to obtain different degrees of reduction. Soil Eh, Fe2+, sugar content and microorganisms in the rhizosphere soil or non-rhizospbere soil were determined at successive times 0, 20, 40, 60, 80 and 100 days after sowing. At the same time, crown roots were separated from the main stem according to each ‘shoot units.’ Observations were made on the precipitation of iron oxides, and the colonization of bacteria and Polymyxa graminis-like organisms on crown root surfaces under the microscope at a magnification of 200-400 × . The results obtained were as follows. 1) In the non-rhizospbere soil, the level of reduced eondition inereased in the plot witb earlier submergence. In contrast, the reduction of the rhizospbere soi...