Effects Of Zinc And Chromium Accumulation And Absorption Of Nourishment In Wheat And Pea Intercropping

This researchon farms in purple soil of Sichuan Agricultural University is to test the soil and the soil environmental quality in accordance with national standards (GB15618-1995).A secondary standard will be applied (dry) after joining the metals zinc and chromium balance through the pot experiment system of Mianyang31/Bald-headed wheat and edible podded pea/cinnabar pea intercropping and monoculture florescence effectiveness of zinc, chromium and nutrient content in soil, two crops florescence zinc and chromium accumulation and plant nutrients (nitrogen, phosphorus, potassium) absorption, crop biomass, crop Physiology and biochemistry, and so on. On this basis, comparison of different planting patterns and repair effects of zinc and chromium-contaminated soil, zinc, chromium-contaminated soil on crop production security to provide some reference. Results of the study are as follows:l.And the florescence, intercropping will reduced both in crop rhizosphereand soil heavy metal contents of available zinc and chromium. Bald wheat intercropping peas and cinnabar on zinc in wheat rhizosphereand soil heavy metals-registered the largest decrease of available content by13.69%. Mianyang31dishes and fresh pods, pea intercropping in wheat rhizosphere soil and heavy metal chromium registered the largest decrease of available content of12.55%. Intercrop reduced two crops florescence in the heavy metal content of Zn-Cr. Mianyang,31, and two types of pea intercropping on the heavy metal content of zinc-chromium reduction in bald-headed than wheat. Intercropping increases florescence zinc, heavy metal content of chromium as a percentage or in the cytoplasm of the cell wall, lower percent zinc chromium content of heavy metals in the cell.2.Intercropping reduce both zinc and chromium content of heavy metals in crop maturity grain. Bald wheat and pods pea intercropping wheat registered the largest decrease of Cr content in wheat grain that is28.44%. Mianyang31pea intercropping of wheat grain and cinnabar, registered the largest decrease of zinc, for13.39%; pods pea and Mianyang31intercropping peas, registered the largest decrease of zinc content in the grain,6.12%; pods pea and bald head wheat of chromium content in wheat grains of pea intercropping also registered the largest decrease to28.66%. 3.Flowering, intercropping wheat soil pH is higher than monoculture wheat; pea intercropping on soil pH is less than a single pea. Bald wheat and the cinnabar peas intercropping on wheat rhizosphere soil pH. Cinnabar peas and Mianyang31intercropping peas soil pH to reduce; intercropping improve the content of nitrogen and potassium in the flowering stage; two crops rhizosphere soil and non-rhizosphere soil, reducing the available phosphorus content in the soil. The cinnabar pea and the bald wheat intercropping on soil nitrogen content will increased by51.82%. Bald wheat and cinnabar pea intercropping K content in the soil will decrease by41.94%. Intercropping will improve the content of N, P and K in the two crops roots, stems and leaves at the flowering stage, the Mianyang31and two pea intercropping on nitrogen and phosphorus content in wheat plants will increased by66.67%and112.28%, respectively; bald wheat and two pea intercropping potassium content in plants will increase by63.38%.4.Two kinds of crops intercropping enhance florescence in root, stem and leaves SOD、POD、 CAT activity. two peas and blad wheat intercropping on plant stems, leaves the CAT activity increased more notably, namelyl6.79%and12.74%, edible podded pea two wheat and pea intercropping on plant roots, stem and leaves its CAT activity increased more, that is64.35%、20.4%and22.62%; for POD activity increases, Mianyang31, demonstrate better than bald wheat advantages, edible podded pea dishes pea cinnabar demonstrate better advantage of bald wheat and edible podded dishes pea intercropping on the root, stem and leaf of wheat SOD activity registered the largest increase, respectively37.50%, and9.87%and11.51%, edible podded pea dishes, wheat and pea intercropping on plant stems, leaf SOD activity registered the largest increase, respectively,22.28%and16.12%.5.Intercropping generally enhance florescence to crops in root, stem, leaf soluble sugar and soluble protein content, Mianyang31and two species of pea intercropping on plant root, leaf soluble protein contents of wheat registered the largest increase, respectively117.16%and9.82%。In Mianyang31, and edible podded pea dishes pea intercropping on plant stems, leaf soluble sugar content of wheat registered the largest increase, which are15.86%and11.42%.6.Wheat intercropping increase biomas.Biomass registered the largest increase of 1.37g per plant (blad wheat)、8.06g per plant(Mianyang31),1.18g per plant (Mianyang31). Reduces the biomass of peas, which registered the largest decrease in the biomass of n, respectively0.78g per plant (cinnabar Bowl),3.92g per plant (cinnabar Bowl),0.54g per plant (dishes fresh pods pea); Intercropping increase maturity of wheat grain yield, is registered the largest increase of pea intercropping with cinnabar in Mianyang31, for10.96g per plant,Reduces the production of mature peas grain,registered the largest decrease in Mianyang31intercropping of cinnabar, Bow1,9.85g per plant.The results show that, in the compound pollution of Zn and Cr in the soil, it can change the soil pH by wheat and peas intercropping, reduce the content of zinc and chromium in soil and reduce the accumulation of Zn, Cr in two plant in vivo, and by zinc chromium distribution in plant subcellular and flowering plant physiology biochemical changes can be seen, due to the reduced zinc chromium accumulation is because intercropping increased crop resistance, the same time as improving the soil nutrient (NPK) effectiveness, and promote the nitrogen phosphorus and potassium uptake and utilization of wheat and pea, thereby increasing the biomass and yield. On the yield of Mianyang31is superior to the blad of wheat, in terms of safety of food production, blad of wheat is better than Mianyang31, therefore, to choose the appropriate varieties, can provide certain reference for the production of food security of compound pollution of Zn and Cr in soil.