| The purpose of this paper is to explore which field boundaries can effectivelymaintain plant diversity of the whole agricultural ecosystem, so as to provide ascientific basis for plant diversity protection, boundary management, planning andmaintain the sustainable development of agro-ecological system. Set a case study ofWurenqiao Town in Anguo City, we studied the temporal-spatial variation rules ofplant diversity and soil physical and chemical properties in7different kinds of filedboundaries based on field investigation in three different periods. The relationshipbetween plant diversity and soil physical and chemical properities was studied usingcorrelation analysis and the gray relational analysis. Meanwhile, we studied thefactors influncing plant diversity and species composition in field boundaries usingGeneral Linear Model (GLM) and Redundancy Analysis (RDA). The conclusions areas follows:(1) Plant diversity indices are different in the seven types of field boundaries.The variation of Shannon-Wiener diversity index (H) of different boundaries is H(roads)>H (shelter forests+ditches)>H (ditches)>H (roads+ditches)>H (roads+shelterforests+ditches)>H (roads+shelter forests)>H (shelter forests). The variation ofSimpson ecological dominance index (D) of different boundaries is D (roads)>D(roads+ditches)>D (ditches)>D (shelter forests+ditches)>D (shelter forests)>D(roads+shelter forests)>D (roads+shelter forests+ditches). The variation of Margalefrichness index (R) of different boundaries is R (ditches)>R (roads)>R (shelterforests+diches)>R (shelter forests+roads+ditches)>R (roads+ditches)>R(roads+shelter forests)>R (shelter forests). The variation of Pielou evenness index (E)of different boundaries is E (roads+ditches)>E (roads)>E (roads+shelter forests)>E(roads+shelter forests+ditches)>E (shelter forests+ditches)>E (ditches)>E (shelterforests).(2) The content of soil water, organic matter, available phosphorus, availablepotassium and Ca of the seven types of boundaries are significant difference. A highercontent of soil water, total potassium and Ca are founded in boundaries which are mainly composed of roads and ditches than in those which are mainly composed offorests.(3) Plant diversity indices in field boundaries are positively correlated with soilwater content, PH, total potassium and Ca, but negatively correlated with organicmatter, total nitrogen, total phosphorus, available phosphorus and potassium.(4) Boundary type and land use of adjacent farmland significantly affect plantdiversity of field boundaries, while boundary width has nearly no influence.(5) Species composition of field boundaries are mainly affected by soil PH,moisture, organic matter, available phosphorus and available potassium in the aspectof soil factors, and is mainly affected by boundary type and boundary width in theaspect of boundary structure. |
