Enhanced irrigation volume reduces salinity and improves deep root zone soil nutrients, phosphatase activity and changes root traits of fruit trees

Li, Yanjie; Li, Zhijie; Gong, Ping; He, Xinlin; Liu, Hongguang; Li, Ling; Wang, Chunxia; Li, Pengfei; Wei, Jie; Yu, Xuyong

doi:10.1016/j.agwat.2024.109001

Agricultural Water Management

2024

DOI: 10.1016/j.agwat.2024.109001

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Enhanced irrigation volume reduces salinity and improves deep root zone soil nutrients, phosphatase activity and changes root traits of fruit trees

Yanjie Li,

Zhijie Li,

Ping Gong

et al.

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2024

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Nutrient distribution and utilization in apple–soybean alley-cropping systems under different drip irrigation emitter line deployments and mulching methods in the Loess Plateau of China

Zheng,

Wang,

Wan

et al. 2024

Preprint

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Aims Apple–soybean alley cropping is one of the typical alley-cropping models in the Loess Plateau of China. The study aimed to alleviate interspecific competition intensified by the growth of fruit trees using the combination of drip irrigation emitter line and mulching to regulate soil nutrient distribution and analyze effects on nutrient utilization. Methods A three-year field trial was conducted in apple–soybean alley-cropping systems, setting up three drip irrigation emitter line spacings (L1: one emitter line per soybean row; L2: one emitter line for every two rows; L3: one emitter line for every three rows) and two mulching methods (M1: mulching; M0: non-mulching). Results Rapidly available phosphorus (AP), rapidly available potassium and total phosphorus contents varied greatly at the same spacing, whereas AP content varied greatly at different spacings. Compared with M0, yield, nutrient contents and use efficiency of M1 significantly increased. Most of the nutrients at the denser spacing (L1) were concentrated in the surface layer with uniform distribution. At the wider spacing (L3), nutrient distribution was uneven, resulting in fewer nutrients uptake and utilization by roots. The moderate spacing (L2) with mulching alleviated the interspecific competition by optimizing nutrient distribution and facilitating root niche separation between trees and crops. In the three years, M1L2 consistently displayed the highest yield, nutrient contents and utilization efficiency. Principal component analysis showed that M1L2 achieved the highest comprehensive score. Conclusions The results recommended the use of M1L2 in young apple–soybean alley-cropping systems, with L1 as a preferable control measure if M0 is used.

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Nutrient distribution and utilization in apple–soybean alley-cropping systems under different drip irrigation emitter line deployments and mulching methods in the Loess Plateau of China

Zheng,

Wang,

Wan

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

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Enhanced irrigation volume reduces salinity and improves deep root zone soil nutrients, phosphatase activity and changes root traits of fruit trees

Cited by 1 publication

References 55 publications

Nutrient distribution and utilization in apple–soybean alley-cropping systems under different drip irrigation emitter line deployments and mulching methods in the Loess Plateau of China

Nutrient distribution and utilization in apple–soybean alley-cropping systems under different drip irrigation emitter line deployments and mulching methods in the Loess Plateau of China

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