Recovery growth and water use of intercropped maize following wheat harvest in wheat/maize relay strip intercropping

Ma, Longshuai; Li, Yinjuan; Wu, Pute; Zhao, Xining; Gao, Xiaodong; Xiao-li, Chen

doi:10.1016/j.fcr.2020.107924

Cited by 27 publications

(30 citation statements)

References 81 publications

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“…The CGR of intercropped maize was lower than sole cropping before wheat harvest, but higher after wheat harvest. This result was consistent with previous studies, with aboveground dry matter of maize showing recovery growth after wheat harvest 5 . Therefore, the weighted means of BY in intercropping was 24.7 to 32.9% higher than that of monocropping.…”

Section: Discussionsupporting

confidence: 94%

“…After wheat harvest, it decreased and reached the second maximum value when maize was at early grain filling stage. The possible reason maybe that intercropped wheat was earlier planted and created a competitive advantage over the later planted intercropped maize for resources uptake during co-growth period, resulted in a strong suppression of intercropped maize 5,9 . Thus, the CGR of the intercropped wheat was higher than sole wheat.…”

Section: Discussionmentioning

confidence: 99%

“…Research has shown that the accumulation and translocation of dry matter can be used to measure cultivation technologies 5,23,24 . The grain yield is commonly directly related to the transportation of photosynthetic products that are stored in vegetative organs to the reproductive organs 25,26 .…”

mentioning

confidence: 99%

“…How to raise productivity and simultaneously ensure food security on the premise of environmental friendliness is a thought-provoking issue. Intercropping, cultivating two or more crop species simultaneously on the same field , is practiced widely throughout the world and considered to be an environmentally friendly system, as well as serving as a sustainable agricultural production system [3][4][5] . The primary reason that there are advantages to intercropping depends on the efficient use of light, nutrients, water, and other resources 3,6,7 .…”

mentioning

confidence: 99%

“…The grain yield is commonly directly related to the transportation of photosynthetic products that are stored in vegetative organs to the reproductive organs 25,26 . Tillage 27 , irrigation 5 , row ratio 24 , and the management of N fertilizer 19,28,29 are those measures that affect dry matter. Among them, the management N fertilizer can directly affect the efficiency of leaf photosynthetic, thus, influencing the accumulation and translocation of dry matter 30,31 .…”

mentioning

confidence: 99%

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N-fertilizer Postponing Application Improves Dry Matter Translocation and Increases System Productivity of Wheat/Maize Intercropping

Chai

et al. 2021

Preprint

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Intercropping increases the grain yield to feed the ever-growing population in the world. It has been proven that N-fertilizer postponed topdressing can boost the productivity of cereal/legume intercropping. However, whether the application of this technology to cereal/cereal intercropping can still increase grain yield is unclear. A field experiment was conducted from 2018 to 2020 in the arid region of northwestern China to investigate the accumulation and distribution of dry matter and yield performance of wheat/maize intercropping in response to N-fertilizer postponed topdressing approaches. Allocations that were subjected to topdressing at the jointing and 15 d post-silking stages using the amount of nitrogen fertilizer (N3) that is traditionally used for maize production used only 30% and 10% of the total amount nitrogen, respectively. The allocations of postponed topdressing treatments of the two N fertilizers at these two stages were 10% and 30% for N1, and 20% and 20% for N2. The results showed that the postponed topdressing N fertilizer treatments boosted the maximum average crop growth rate (CGR) of wheat/maize intercropping. The N1 and N2 treatments increased the average maximum CGR by 32.9% and 16.4% during the co-growth period, respectively, and the second average maximum CGR was increased by 29.8% and 12.6% during the maize recovery growth stage, respectively, compared with the N3 treatment. The N1 treatment was superior to other treatments, since it increased the CGR of intercropped wheat during the co-growth period and accelerated the CGR of intercropped maize after the wheat had been harvested. This treatment also increased the biomass and grain yield of intercropping by 8.6% and 33.7%, respectively, compared with the current N management practice. This yield gain was primarily attributable to the higher total translocation of dry matter. The intercropping system increased the translocation of dry matter to grain in vegetative organs, while the N fertilizer postponed topdressing promoted this effect. Therefore, the harvest index of intercropped wheat and maize with N1 was 5.9% and 5.3% greater than that of N3, respectively. This demonstrated that optimizing the management of N fertilizer can increase the grain yield from wheat/maize intercropping via the promotion of accumulation and translocation of dry matter.

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Section: Discussionsupporting

confidence: 94%

Section: Discussionmentioning

confidence: 99%