间作对水稻根系分布特征的影响

Effects of Rice Cultivars Intercropping on Root Distribution Characters

通过田间试验,研究了两种水稻品种黄壳糯与合系41间作条件下的根系分布特征。结果表明:间作黄壳糯的根深指数显著高于单作,较单作提高49%。合系41第1行的根深指数显著高于第2行和第3行,分别比第2行和第3行高了26.7%和24.9%,且第2行和第3行之间的根深指数无显著差异。间作黄壳糯产量较单作黄壳糯呈增加趋势,但未达显著差异。合系41第1行的产量显著低于第2行、第3行及合系41单作的产量,分别低了23.7%,24.6%和24.6%,但合系41间作第2行、间作第3行与合系41单作之间的产量无显著差异。本试验应用Sufer软件绘制的根系分布图表明:合系41第1行表层根密度较小,下层根密度较大,根系总量显著减少;单作黄壳糯根系呈两边伸展,而间作黄壳糯根系则深层次分布较多。

Field experiment was conducted to study root distribution characters under Huangke-nuo and Hexi-41 rice intercropping system. The results showed that root depth index of intercropping Huangkenuo was dramatically higher than that monocropping. The root depth index of intercropping was increased 49% more than monocropped. As for Hexi-41, root depth index of the first row was significant higher than those of the second and the third one, the percentage is 26.7% and 24. 8% , and there were not significant different between the second row and the third row. The yield of huangke-nuo intercropping was presented increasing trend than the monocropped huangke-nuo, but there was not significant difference. The yield of the first row of Hexi-41 significant lower than the second row, the third row and the monocropped respectively, the percentage is 23.7%, 24. 6% and 24. 6%. But the yield of the second row, the third row of the Hexi-41 intercropped and the Hexi-41 monocropped were not signif icant difference. The results from the Sufer soft analysis showed that root density in surface layer of the first row of Hexi-41 was relatively less, but in the bottom layer was higher, the total amounts of the roots were remarkable decreased with intercropping treatment. The root of the monocropped huangkenuo was stretched toward the both sides, but the depth of the root of the intercropped Huangke-nuo was more deeper and the distribution of layers widely.