Coupling effects of irrigation amount and fertilization rate on yield, quality, water and fertilizer use efficiency of different potato varieties in Northwest China

• DOI: 10.1016/j.agwat.2023.108446
• Publication Date: 2023-07-13T04:09:07Z
• Authors: Fan Zhang; Mengru Chen; Jintao Fu; Xiangzhu Zhang; Yuan Li; Yating Shao; Yingying Xing; Xiukang Wang
• Keywords: HD9000-9495; Yield; Overall difference combination evaluation model; Agriculture (General); 04 agricultural and veterinary sciences; Agricultural industries; Quality; S1-972; Variety; 0401 agriculture, forestry, and fisheries; Potato; Soil enzyme activity

Water shortage, excessive fertilization and improper variety selection have seriously restricted the sustainable development of potato in Northwest China. Two-year field experiments were conducted 2021 2022 to explore effects irrigation amount fertilizer application rate on growth, yield, nutrient uptake, quality, water, use efficiency, soil enzyme activity economic benefits different varieties. Three levels W1 (100% crop evapotranspiration (ETC)), W2 (80% ETC) W3 (60% ETC). rates F1 (240 kg N ha−1), F2 (180 ha−1) F3 (120 ha−1). locally grown cultivars V1 (Feiurita), V2 (Longshu 7), V3 (Qingshu 9). The results showed that amount, significantly influenced tuber commercial tubers, maximum weight, reduced sugar content, water productivity (WPI), partial (PFP), catalase (SCA), total income, net input-output ratio. chlorophyll photosynthetic rate, dry matter accumulation, starch vitamin C crude protein content increased with increase amount. With plant nitrogen (N), phosphorus (P), potassium (K) absorption, WPI, income first then tended stabilize or even decline. On average, WPI 19.3% (6.9%), 1.6% (1.6%), 8.8% (10.4%), 3.8% (10.5%) 21.1% (7.8%), 34.6% (14.9%) higher than those (2022), respectively. In two years, average PFP SCA treatment 13.1%, 14.5%, 16.4% 4.8% treatment, Among all treatments, T5 (W2F2V3) had highest P SCA, alkaline phosphatase (SPA), sucrase (SSA) lowest reducing content. Plant accumulation N, K was closely related yield a significant positive correlation SSA. Based comprehensive differential combination evaluation model, considering growth development, efficiency benefits, best treatment. After evaluation, optimal ranges 270–290 mm 167 ha−1 193 ha−1, present study provides basis for evaluating selecting better management practices effective varieties