| Response of greenhouse nectarine growth and yield to water deficit under drip irrigation in Windy\|Sandy Area in Northern Shaanxi |
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| DOI：10.7606/j.issn.1000-7601.2020.03.05 |
| Key Words: nectarine in greenhouse drip irrigation water deficit water use efficiency fruit yield fruit growth SPAD |
| Author Name | Affiliation | | ZHANG Peng | The Key Laboratory of Agricultural Soil and Water Engineering in Arid Areas Subordinated to the Ministry of Education, Northwest A&F University, Yangling, Shaanxi,712100,China | | CAO Hongxia | The Key Laboratory of Agricultural Soil and Water Engineering in Arid Areas Subordinated to the Ministry of Education, Northwest A&F University, Yangling, Shaanxi,712100,China | | ZHANG Jiankai | The Key Laboratory of Agricultural Soil and Water Engineering in Arid Areas Subordinated to the Ministry of Education, Northwest A&F University, Yangling, Shaanxi,712100,China | | HU Xiaotao | The Key Laboratory of Agricultural Soil and Water Engineering in Arid Areas Subordinated to the Ministry of Education, Northwest A&F University, Yangling, Shaanxi,712100,China |
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| Abstract: |
| To examine the adaptability of drip irrigation under different water treatments to greenhouse nectarine in Windy\|Sandy Area of Northern Shaanxi is helpful to provide an approach and basis for irrigation schedule meeting the requirement of water saving and yield increasing under drought and water shortage environment. The field experiment included four treatments, three drip irrigation treatments (W1, W2, and W3) and local surface flooding treatment (CK). When the soil moisture content of any treatment reached 50% of the irrigation water limit, uniform irrigation event began, the upper limits of irrigation were respectively 90%θf (W1), 75%θf (W2), and 60%θf (W3).After the pre\|experiment in 2017,shoot growth, stem maximum daily shrinkage (MDS), fruit diameter, leaf chlorophyll relative content (SPAD), yield and water production efficiency of nectarine trees etc. were recorded toexplore the effects of different water treatments in 2018.Results showed that shoot growth was positively correlated with drip irrigation amount;the MDS mean values of different growth periods showed significantly different at different treatments (P<0.05); the SPAD value of leaves varied significantly during the second fruit expansion period and fruit harvest period, W2 owned higher SPAD value during the whole fruit growth period,moderate water deficit improved the photosynthesis at the critical stage of fruit growth. For fruit growth, the transverse diameter and seam diameter of CK were separately 44.3 and 46.0 cm at the fruit harvest period when the W2 reached 53.3 and 55.9cm; the fruit numbers of W1 and W3 were 20.8% and 5.7% higher than that of the W2 of 49.3, respectively, while CK owned the lowest value of 40.7; W2’s mean fruit weight was 106.39 g that was significantly higher than that of other treatments.The effect of severe water stress on yield reduction was significant,the yield of W1,W2, and W3 was 24 446.8, 23 303.7 kg·hm-1 and 20 777.2 kg·hm-1, respectively,but it was only 15 845.3 kg·hm-1of CK; the WUE of W1, W2, and W3 was 188%, 299%, and 614.4% of CK, respectively. For the continuous deficit irrigation, the treatment W2 with no evident yield reduction could maintain better photosynthesis in the critical period of nectarine and increased fruit weight and WUE. |
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