Acta Agriculturae Zhejiangensis ›› 2023, Vol. 35 ›› Issue (12): 2854-2864.DOI: 10.3969/j.issn.1004-1524.20221775

• Horticultural Science • Previous Articles     Next Articles

Effects of different water treatments on growth and nutrient uptake of Actinidia valvata Dunn seedlings under substrate culture

CHEN Dagang1(), XU Kaiwei1, PENG Dandan1, YOU Haoyu1, YANG Ran1, LIAO Huiping2, CHEN Yuanxue1,*()   

  1. 1. College of Resource, Sichuan Agricultural University, Chengdu 611130, China
    2. Sichuan Huasheng Agricultural Co., Ltd., Mianzhu 618200, Sichuan, China
  • Received:2022-12-10 Online:2023-12-25 Published:2023-12-27

Abstract:

In this study, Actinidia valvata Dunn rootstock seedlings were used as test materials, combined with the suitable material ratio of early kiwifruit under substrate culture (coconut bran∶peat∶perlite=2∶4∶4, volume ratio), 6 different moisture treatments were set at 20% (SMC-20%), 40% (SMC-40%), 60% (SMC-60%), 80% (SMC-80%), 100% (SMC-100%), 120% (SMC-120%) of the saturated moisture content (SMC). In order to screen out the water management scheme suitable for Actinidia valvata Dunn seedlings under substrate culture. The results showed that the seedling height, stem diameter, chlorophyll relative content (SPAD) value, dry matter accumulation, root activity, total root length, total root surface area, total root volume, nitrogen, phosphorus and potassium nutrient accumulation were all better under SMC-100% treatment. Compared with other treatments, they averagely increased by 99.83%, 149.08%, 16.43%, 264.30%, 72.81%, 227.53%, 194.99%, 156.72%, 395.88%, 374.85%, 342.72%, respectively. Seedling growth indicators performed poorly under SMC-20% and SMC-40% treatments and were severely reduced compared with SMC-100% treatment. The performance of seedling growth index under SMC-60% and SMC-80% treatment was slightly lower than that under SMC-100% treatment. Although excessive water (i.e. SMC-120% treatment) had little effect on root growth, excessive irrigation caused nutrient loss in the substrate, resulting in decreased nutrient absorption capacity of seedlings, and poor above-ground growth of the seedlings. These results indicated that the kiwifruit seedlings under SMC-100% treatment had a better effect, and could be used as a suitable water management scheme for the substrate culture of Actinidia valvata Dunn seedlings.

Key words: Actinidia valvata Dunn, substrate culture, water treatment, seedling growth, nutrient uptake

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