刈割、AM真菌和施磷对根箱栽培中柑橘和柱花草生长的影响

Effects of mowing, AM fungal inoculation and phosphorus application on growth of Citrus sinensis and Stylosanthes gracilis in a rhizobox

利用根箱栽培模拟果园生草栽培,以柑橘Citrussinensis(L.)Osbeck.cv.Luogangcheng和柱花草StylosanthesgracilisH.B.K.cv.Graham来研究生草刈割、AM真菌和施磷在减轻养分竞争上的作用.结果表明,3种措施在不同程度上减轻了柱花草对柑橘生长的抑制效应,增加了柑橘的株高、叶片数和干质量;柱花草刈割的作用最明显,导致柱花草的根冠比急剧降低,表明刈割可能是通过抑制根系生长来减轻养分竞争.

Rhizobox was employed to stimulate the sod culture orchard, with Citrus sinensis and Stylosanthes gracilis as plant material. The effects of grass mowing, arbuscular mycorrhizal inoculation and P application on minimizing the competition between fruit tree and grass were investigated. Results indicated that 3 practices alleviated the inhibiting effect of grass on citrus at different magnitude, leading to increased plant height, leaf number and dry matter. Grass mowing took the greatest effect among 3 practices, resulting in a sharply decreased (R/S,) which implied a mediated nutrient competition following inhibition of root growth by grass mowing.