灌溉量对露地辣椒产量及部分生理指标的影响

在膜下滴灌条件下,研究了不同灌水定额(20、25、30、35、40、45 m3·667 m-2)对辣椒产量、丙二醛(MDA)、可溶性糖、可溶性蛋白和脯氨酸含量、超氧化物歧化酶(SOD)和过氧化物酶(POD)活性的影响.结果表明:灌水定额30 m3·667 m2处理的辣椒产量最高,分别较灌水定额20、35、40、45 m...

Effects of irrigation amount on yield and some physiological indicators of pepper in open field

The effects of scale irrigation(25,30,35,40,45 m3·667 m-2) on yield,MDA,soluble sugar,soluble protein and proline content,activities of SOD and POD were studied in this paper.The results indicated that the yield of scale irrigation 30 m3·667 m-2 treatment was the highest.The yield of scale irrigation 25,30,35,40,45 m3·667 m-2 treatments reduced 24.2 %,9.1 %,10.9 % and 13.3 % respectively compared to 30 m3·667 m-2 treatment.There was no significant difference between scale irrigation 25 and 30 m3·667 m-2 treatment.The content of MDA,proline,soluble sugar and soluble protein in leaves of pepper plants in scale irrigation 20 and 25 m3·667 m-2 treatment were higher than that of 30 m3·667 m-2 treatment,while the SOD activity in the period of flowering fruit and the POD activity of pre-harvest senescence were lower than that of 30 m3·667 m-2 treatment.That demonstrated that the plants suffered from the physiological effects induced by drought stress.The treatment of scale irrigation 35,40,45 m3·667 m-2 had a higher content of soluble sugar and a lower content of soluble protein than that of the treatment of 30 m3·667 m-2.These indexes showed that inhibition caused by too much water for physiological of pepper plant.