Screening and Evaluation of Chenopodiaceae Plant Suitable for Saline-Alkali Land Improvement in Central Gansu Province
In order to screen suitable salt reducing plants and soil improvement plants in central Gansu,we planted 13 indigenous Chenopodiaceae plants of 4 species(including Halogeton glomeratus,S.collina,Atriplex centralasiatica and S.corniculate)in Qilihe District,Lanzhou City,Gansu Province,and observed their field agronomic traits and soil chemical properties.The results showed that the biomass of material 203(Salsola collina)was the highest,and the plant height of material 109(Suaeda corniculata)was the highest among the four indigenous Chenopodiaceae plants.Compared with soil without Chenopodiaceae plants,planting most species of Chenopodiaceae materials could increase the content of organic matter,alkaline hydrolysis nitrogen,available phosphorus,available potassium,total nitrogen,and total phospho-rus in most of the shallow soil layers(0-10 cm),while also increasing the total potassium content in soil(0-30 cm).Meanwhile,it reduces the pH value of the 0-30 cm soil layer and the electrical conductivity of soil solution in the 0-20 cm soil layer.Among them,material 95(H.agglomerate)had obvious salt-reducing effect on the 0-20 cm soil layer.The results of comprehensive evaluation showed that material 303(S.cor-niculata)had the highest score and was a suitable plant for reducing salt and improving soil in central Gansu.
Chenopodiaceae plantsSaline-alkali land improvementAgronomic traitsSoil chemical propertiesSoil solution conductivity
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