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6. Response of soil physicochemical properties and fruit quality to CL-PAM-Ks in apple orchards in dryland

Author

AN Xiaojuan, GUO Zhigang, CHEN Nana, JIA Yuanyuan, LI Yutao, ZOU Yali, and HU Liping

Subjects
super absorbent polymer, apple orchard, soil physicochemical properties, fruit quality, Agriculture (General), S1-972, Irrigation engineering. Reclamation of wasteland. Drainage, TC801-978
Abstract

【Background】 Drought is an important factor restricting China’s agricultural development. Tianshui City of Gansu Province is located in the inland, with a warm temperate semi-humid and semi-arid climate, thin soil layer, unfertile land and lack of irrigation conditions. Natural rainfall is an important source of agricultural irrigation water, but affected by geographical location and climatic conditions, the average annual rainfall is small and uneven. As a result, crops have low utilization efficiency of rainfall. Therefore, it is particularly important to improve crop water use efficiency in arid areas. CLP type super absorbent polymer is a kind of new polymer materials, water absorption and water retention ability is very strong, containing a large number of strong water absorption, high permeability can be induced by association with and through the base mesh structure, absorb hundreds of times to thousands of times more than its weight of water, for a variety of crops, fruit trees, vegetables and so on root directly provide plenty of water, to ensure that the crop growth environment, It has positive significance to improve the water use efficiency of orchard. 【Objective】 The purpose of this paper is to study the effect of CLP type super absorbent polymer on soil physical and chemical properties and fruit quality of apple orchard in dryland. 【Method】 This experiment used crosslinked polyacrylamide (acrylamide-potassium acrylate copolymer, English name is CL-PAM-K, abbreviated as CLP) super absorbent polymer. Set four treatments, respectively were: CK: no super absorbent polymer; T1:150 g/plant; T2:250 g/plant; T3:350 g/plant. Soil water content, soil nutrients, fruit appearance quality and nutritional quality were measured to comprehensively evaluate the effects of each treatment on soil physical and chemical properties and fruit quality. 【Result】 At the bud stage, T1 treatment decreased the soil electrical conductivity by 5.70%, 10.82% and 19.64%, in the 0-20 cm, 20-40 cm and 40-60 cm soil layers, respectively. At fruit ripening stage, T1 treatment increased the soil water content by 7.26% and 39.12% in the 20-40 cm and 40-60 cm soil layers, respectively, while decreasing the pH value by 3.43%, 1.38% and 0.23% in the 0-20 cm, 20-40 cm and 40-60 cm soil layers, respectively. The fruit peel puncture strength increased by 16%. The application of 250 g/plant increased the soil water content and available nitrogen in the 0~20 cm, 20-40 cm and 40-60 cm soil layers at the bud stage, as well as the available potassium in the 0-20 cm and 40-60 cm soil layers at both the bud stage and fruit ripening stage. The application of 350 g/plant increased the available phosphorus in the 0-20 cm, 20-40 cm and 40-60 cm soil layers at both the bud stage and fruit ripening stage. The application of 250 g/plant increased the soluble protein and total phenol content of apple fruits. 【Conclusion】 The application of 350 g/plant was the optimal amount of drought-resistant soil amendment to improve soil physical and chemical properties and enhance fruit quality in dryland apple orchards.

Published
2024
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15. Progress of Chimeric Antigen Receptor Gene Modified-T Cell Immunotherapy for Thoracic Malignancies

Author

CHEN Fukun, CHEN Nana, DENG Zhiyong, LYU Juan, QIN Wenjing, and ZHU Jialun

Subjects
thoracic malignancies, car-t, immunotherapy, antigen target, solid tumor, Neoplasms. Tumors. Oncology. Including cancer and carcinogens, RC254-282
Abstract

With a deepened understanding of the pathophysiology and pathogenesis of thoracic malignancies, the treatment has been transited from traditional treatment on the basis of surgery, radiotherapy, and chemotherapy to individualized and precise targeted therapy and immunotherapy. As an antitumor immunotherapy, chimeric antigen receptor gene-modified T (CAR-T) cells have been approved by the FDA for the treatment of hematological malignancies in five CAR-T products. They have also achieved good therapeutic effects in solid tumors. However, significant challenges remain in the clinical application of CAR-T cell immunotherapy in thoracic malignancies. In this review, the latest research progress of CAR-T cell immunotherapy in the treatment of thoracic malignancies were summarized, including the basic characteristics of CAR-T cells, the popular target antigens, and the existing problems and challenges, to provide new ideas and strategies for clinical immunotherapy of thoracic malignancies.

Published
2023
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41. The Application of Improved Genetic Algorithm and Least Square Method in Computer Mathematical Modeling

Author

Chen, Nana, Bai, Zhongyu, Kacprzyk, Janusz, Series Editor, Pal, Nikhil R., Advisory Editor, Bello Perez, Rafael, Advisory Editor, Corchado, Emilio S., Advisory Editor, Hagras, Hani, Advisory Editor, Kóczy, László T., Advisory Editor, Kreinovich, Vladik, Advisory Editor, Lin, Chin-Teng, Advisory Editor, Lu, Jie, Advisory Editor, Melin, Patricia, Advisory Editor, Nedjah, Nadia, Advisory Editor, Nguyen, Ngoc Thanh, Advisory Editor, Wang, Jun, Advisory Editor, Sugumaran, Vijayan, editor, Xu, Zheng, editor, and Zhou, Huiyu, editor

Published
2021
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44. Robust and durable self-lubricated surface by facile fabrication for anti-icing/deicing.

Author

Zhou, Longpeng, Liu, Aowei, Tang, Jian, Han, Yanan, Kang, Jun, Li, Yunqiang, Kuai, Siwen, Xue, Xiao, Chen, Nana, and Liu, Hongtao

Subjects
ICE prevention & control, EPOXY resins, SANDPAPER
Abstract

Undesired ice accumulation can lead to serious negative impacts on daily life and equipment safety. Slippery liquid-infused surfaces (SLISs) have been widely studied for their low ice adhesion strength (τ ice ). However, the lack of durability, weak robustness, and complex preparation process hinder the application of SLISs. In this work, robust oil-infused porous surface (RIPS) was obtained by a facile one-step method, which used epoxy resin (E44) as a substrate and contained fumed silica and silicone oil. The RIPS-6 displays outstanding anti-icing/deicing ability, superior liquid repellency, good self-cleaning performance, and excellent mechanical robustness. At −5 °C, the water droplet remained unfrozen after 7200 s. τ ice was only 6.9 kPa at −20 °C and remained below 15 kPa during 10 icing cycles. Furthermore, the mixture of E44 and fumed silica enhanced the mechanical properties including the hardness (4 H) and abrasion resistance of RIPS-6. The icephobicity can be remained (τice < 40 kPa) even after 150 cycles of sandpaper abrasion at 2.5 kPa. The anti-icing and deicing coating with excellent mechanical stability and durability significantly improves the practical application possibility of the coating in harsh environments. [ABSTRACT FROM AUTHOR]

Published
2023
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