Effects of Exogenous Calcium on the Development and Photosynthetic Characteristics of Peanut in Saline-alkali Soil and Normal Soil

doi:10.7668/hbnxb.2018.06.018

Abstract

Abstract: In order to explore the effect of exogenous calcium on peanut planting in saline-alkali soil,Huayu 25 had been used as experimental material to study the effects of exogenous calcium on the agronomic traits and photosynthetic characteristics of saline-alkali soil and non-saline-alkali soil. The results showed that the main stem height,lateral branch length,leaf area index,SPAD value and net photosynthetic rate of peanut in saline-alkali soil were severely inhibited compared with non-saline-alkali soil. The application of exogenous calcium to non-saline-alkali soil increased the peak of leaf area index (LAI) of peanut and increased the net photosynthetic rate (Pn),SPAD value and leaf area index (LAI) of peanut leaves after pod setting phase,which could delay the senescence of peanut.The application of exogenous calcium to saline-alkali soil not only delayed the senescence of peanut after pod setting phase,but also reduced the degree of leaf SPAD value and the net photosynthetic rate increased by 55% before pod setting phase. When the amount of exogenous calcium was 52.2 kg/ha,the effect was not obvious,only to promote the growth of peanut plant height,with the increased of exogenous calcium application,the biological accumulation and its maximum growth velocity increased significantly,thereby increasing peanut kernel percent and yield. Under the experimental conditions,when the amount of exogenous calcium was 156.6 kg/ha,the yield of peanut increased by 43%. The results of this study would provide a theoretical basis for the rational use of calcium fertilizer in the practice of peanut production in saline-alkali soil.

Key words: Peanut, Calcium, Saline-alkali soil, Photosynthetic rate, Agronomic traits, Yield

CLC Number:

S529.01

TIAN Jiaming, ZHANG Zhimeng, DAI Liangxiang, ZHANG Guanchu, CI Dunwei, DING Hong, YANG Jishun, SHI Xiaolong, SHI Shubing. Effects of Exogenous Calcium on the Development and Photosynthetic Characteristics of Peanut in Saline-alkali Soil and Normal Soil[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2018, 33(6): 130-136. doi: 10.7668/hbnxb.2018.06.018.

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