Journal of Nuclear Agricultural Sciences ›› 2019, Vol. 33 ›› Issue (5): 1016-1023.DOI: 10.11869/j.issn.100-8551.2019.05.1016

• Isotope Tracer Technique·Ecology & Environment·Physiology • Previous Articles     Next Articles

Influence of Application Methods of Polypeptidase Activity Promoter on the Dry Matter Accumulation and Distribution, Root Yield, and Quality of Raw-edible Sweet Potato

DUAN Wenxue1, ZHANG Haiyan1,*, XIE Beitao1, WANG Qingmei1, WANG Baoqing1, ZHANG Liming2,*   

  1. 1 Scientific Observation and Experimental Station of Tuber and Root Crops in Huang-Huai-Hai Region, Ministry of Agriculture and Rural Affairs/Crop Research Institute, Shandong Academy of Agricultural Sciencesand, Jinan, Shandong 250100;
    2 Shandong Academy of Agricultural Sciences, Jinan, Shandong 250100
  • Received:2017-11-01 Online:2019-05-10 Published:2019-03-06

有机多肽酶活性促进剂施用方式对鲜食型甘薯干物质积累分配、产量及品质的影响

段文学1, 张海燕1,*, 解备涛1, 王庆美1, 汪宝卿1, 张立明2,*   

  1. 1 山东省农业科学院作物研究所/农业农村部黄淮海薯类科学观测实验站, 山东 济南 250100;
    2 山东省农业科学院, 山东 济南 250100
  • 通讯作者: *张海燕,女,副研究员,主要从事甘薯高产栽培技术研究。E-mail: zhang_haiyan02@163.com;张立明,男,研究员,主要从事甘薯栽培生理研究。E-mail: zhanglm11@sina.com。同为通讯作者。
  • 作者简介:段文学,男,主要从事甘薯高产高效栽培研究。E-mail: duanwenxue2010@163.com
  • 基金资助:
    国家自然科学基金项目(31501261),国家现代农业产业技术体系建设专项(CARS-10-B08),山东省薯类产业创新团队项目(SDAIT-16-09),山东省重点研发计划项目(2016GNC111002)

Abstract: In order to investigate the regulating effect of polypeptidase activity promoter on the yield and quality of the raw-edible sweet potato, a field experiment was conducted by using the raw-edible sweet potato varieties Longshu 9 and Sushu 8. Each cultivar received one of the following treatments: CK-no application of the polypeptidase activity promoter throughout the entire growth period; P1-root dipping prior to planting and foliar spraying at 40 days after planting with the polypeptidase activity promoter; P2-root irrigation when planting and foliar spraying at 40 days after planting with the polypeptidase activity promoter. The effects of polypeptidase activity promoter on the dry matter accumulation and distribution, root yield, and quality were estimated. The results show that P1- and P2-treated plants exhibited considerably higher leaf SPS activity, sucrose content during mid- and late-growth stages, and plant and root dry weights at harvest than CK-treated plants. At harvest, distribution portion of dry matter in the lateral branches and roots of Longshu 9 plants were not significantly different under different treatments. Distribution portion of dry matter in nether leaves of main stem and nether stem of main stem in Longshu 9 P1- and P2-treated plants was significant lower than that in CK-treated plants. For cultivar Sushu 8, distribution portion of dry matter in nether leaves of main stem, nether stem of main stem, lateral branches and growth point of lateral branches in P2-treated plants was significant lower than that in CK- and P1-treated plants. Compared with CK- and P1-treated plants, the distribution portion of dry matter in tuberous roots of P2-treated plants was significantly increased by 8.98% and 6.23% for cultivar Sushu 8, respectively. At harvest, the soluble sugar content of P2-treated plants for Longshu 9 showed no significant difference with that in P1-treated plants and was significantly decreased by 5.22% compared with CK-treated plants. The starch content of P2-treated plants for Longshu 9 was significantly increased by 18.76% and 9.23% compared with CK-and P1-treated plants. The dry matter contents of tuberous roots of P2-treated plants for Longshu 9 showed no significant difference with that in P1-treated plants. Compared with CK treated plants, the dry matter contents of tuberous roots of P1- and P2-treated plants for Longshu 9 significantly increased by 4.56% and 5.71%, respectively. The soluble sugar content of tuberous roots for Sushu 8 showed no significant difference among different treatments whereas the starch content and dry matter contents of tuberous roots in P2-treated plants showed no significant difference with that in P1-treated plants. Compared with CK-treated plants, the starch content and dry matter content of tuberous roots in P2-treated plants were significantly increased by 6.13% and 4.51%, respectively. Compared with CK- and P1-treated plants, the root yield of P2-treated plants were significantly increased by 30.46% and 14.42% for cultivar Longshu 9 and by 27.72% and 11.69% for cultivar Sushu 8, respectively. In conclusion, application of polypeptidase activity promoter improved the root yield and starch content in tuberous roots of raw-edible cultivars. P2-treated plants exhibited the highest increase in root yield and the regulation effects of soluble sugar content in tuberous roots was different among cultivars. This study provides a theoretical basis for industrial development of raw-edible sweetpotato both in quality and in efficiency and for the technologies of ecological planting.

Key words: polypeptidase activity promoter, sweet potato, dry matter, yield, quality

摘要: 为探究有机多肽酶活性促进剂对鲜食型甘薯产量和品质的调控效应,在大田条件下,以鲜食型甘薯品种龙薯9号和苏薯8号为供试材料,每个品种设置全生育期不喷施有机多肽酶活性促进剂(CK)、有机多肽酶活性促进剂栽插前蘸根+栽后40 d叶面喷施(P1)和有机多肽酶活性促进剂栽插时灌根+栽后40 d叶面喷施(P2)3个处理,研究其对鲜食型品种干物质积累分配、产量及品质的影响。结果表明,2个品种的P1和P2处理生长中后期叶片的磷酸蔗糖合成酶(SPS)活性、蔗糖含量、收获期植株总干重和块根干重均显著高于CK。龙薯9号各处理收获期的侧枝茎和块根干物质分配比例均无显著差异,P1和P2处理的主茎下部叶、主茎下部茎干物质分配比例均显著低于CK;苏薯8号P2处理的主茎下部叶、主茎下部茎、侧枝茎和侧枝生长点干物质分配比例均显著低于CK和P1处理,块根干物质分配比例显著高于CK和P1,分别提高8.98%和6.23%。龙薯9号P2处理收获期块根可溶性糖含量与P1无显著差异,但显著低于CK,降低5.22%,P2处理的块根淀粉含量显著高于CK和P1,分别提高18.76%和9.23%,干率与P1处理无显著差异,但均显著高于CK,分别提高4.56%和5.71%;苏薯8号块根的可溶性糖含量各处理无显著差异,且P2处理的块根淀粉含量和干率与P1均无显著差异,但显著高于CK,其中淀粉含量提高6.13%,干率提高4.51%。2个品种P2处理的块根产量均显著高于CK和P1,其中龙薯9号分别提高30.46%和14.42%,苏薯8号分别提高27.72%和11.69%。综上,施用有机多肽酶活性促进剂有利于提高鲜食型品种块根产量和淀粉含量,其中P2处理增产幅度最高,其对可溶性糖含量的调控存在品种间差异。本研究为鲜食型甘薯提质增效和生态种植技术提供了理论依据。

关键词: 有机多肽酶活性促进剂, 甘薯, 干物质, 产量, 品质