Recently, the Weed Research Office of Nanjing Agricultural University published a titled Reduction in weed infestation through integrated in the top agricultural journal”Agronomy for Sustainable Development” Depletion of the weed seed bank in a rice-wheat cropping system. This study is based on the long-term research of the research team revealed that weed seeds are adapted to the spreading law of irrigation water in the rice field ecosystem for a long time, targeting the root source of weeds in the soil seed bank , The application of two simple physical and ecological measures to clean the irrigation water source (intercepting) and net fishing of floating weed seeds (net fishing), combined with the”weeding” and”reducing medicine” precise ecological grass control technology for continuous cropping of rice and wheat , To truly achieve both the symptoms and root causes of weed prevention and control.
After 6 years of implementation of , the size of the weed seed bank has decreased by 51%, and the occurrence of weeds in the rice-wheat crops has dropped significantly by 53%. It is equivalent to or better than the conventional 5-6 weeding methods for weed control, but reduces 2-3 times of chemical weeding (reducing the amount of chemical herbicides up to 40%), and also reduces the cost of weeding by 30%, which truly realizes the use of physical ecological technology The purpose of”dropping grass” and”reducing drugs”. This research takes the dominant weed in wheat fields, Nihon Niang, as an indicator, and uses a matrix model to simulate and monitor the dynamics of its life history, and quantifies the control of weeds in the field for the first time.
Jiangyin Experimental Field Overview
Changes in soil weed seed bank under different weed control measures over time
The paper is based on Dr. Zhang Zheng as the first author, Professor Qiang Sheng as the corresponding author, and graduate doctoral students Li Ruhai and Zhao Can as co-authors. This research is the first successful case of field trial and application research based on the long-term community trial in Nantong, Jiangsu, which started in 2000 and lasted for 8 years. It provides a theoretical basis for the application of precision ecological weed control technology in rice-wheat continuous cropping fields based on reducing weed communities in the large-scale application of weed control in rice ecosystems in my country. In order to develop this ecological grass control technology, the team carried out basic research on the application of weed seed floating, propagation dynamics, and adaptation mechanisms in the rice field ecosystem, which were published in Agronomy for Sustainable Development (2018), Agriculture , Ecosystems & Environment (2019), Pest Management Science (2014, 2017, 2020a, b) and other top journals in the field of agriculture and plant protection. Presided over the formulation of local standards for ecological green grass control technology for rice fields in Jiangsu Province. Core technology applications and 4 domestic and international patents. Following up, field demonstrations and promotion have been carried out in Jintan, Suqian, Huai’an, Kunshan, Xinghua, Anhui, Fanchang and Baihu, etc., and have been successful.
At present, my country’s farmland weed control mainly relies on chemical herbicides, but long-term excessive application of chemical herbicides has led to the occurrence of weed resistance and environmental pollution , The safety of agricultural products has reduced the biodiversity of farmland. Weed control has reached the”crossroads” of development, directly threatening the safety of food production and the sustainable development of agriculture. The No. 1 Central Document in 2021 once again emphasizes the green prevention and control of pests. This precise ecological grass control technology undoubtedly provides a subversive, highly operable, reproducible, and popular green grass control technology support for the implementation of the central spirit.