In order to clarify the relationship between different precipitation patterns and nitrogen uptake and transport in wheat plants, and to explore efficient production technology paths for different crop types, this experiment investigated the effects of different precipitation patterns and crop types on nitrogen uptake and utilization, transport characteristics, and nitrogen efficiency in wheat plants at the experimental demonstration base of the Zhumadian Academy of Agricultural Sciences of Henan Province for two consecutive years. The results showed that the high water year was more conducive to the absorption of nitrogen by wheat plants after soybean cropping compared to the low water year, improving the accumulation of nitrogen in wheat plants and promoting the transport of nitrogen accumulated after flowering to the grains. Both soybean and peanut stubble could increase the nitrogen content of wheat plants compared to corn stubble, which was beneficial for nitrogen accumulation in wheat plants, promoting the transfer of nitrogen from leaves, stems and sheaths to grains, improving the pre flowering nitrogen transport and nitrogen transfer rate of wheat plants, and ultimately increasing the nitrogen efficiency and yield of wheat grains. The nitrogen absorption efficiency and nitrogen production efficiency of wheat plants with different crop types could be significantly improved in the year of abundant water compared to the year of insufficient water. Under different precipitation year types, both soybean and peanut stubbles can promote nitrogen absorption in wheat plants, which is beneficial for nitrogen accumulation and transportation to the grains after flowering, thereby increasing grain yield and ultimately improving nitrogen utilization efficiency of wheat plants. In low water years, soybean stubble has a better effect, while peanut stubble has a better effect in high water years.

Huixiangjing 977 is a japonica rice variety selected from Zhendao 14 as the female parent and Wuxiangjing 14 as the male parent. It was approved for variety review in 2022. This article analyzed the breeding process,agronomic characteristics, production performance,and main cultivation techniques of Huixiangjing 977. Huixiangjing 977 has the advantages of high-quality taste, high yield,large panicle,excellent comprehensive traits, and wide adaptability, making it suitable for planting in single season and double season late japonica rice regions in Anhui Province. The principles of high-yield cultivation techniques are to stabilize the foundation, compete for sufficient panicles, attack large panicles, improve grain weight and seed setting rate, in order to obtain higher quality and yield. The results provide a reference for the promotion and application of this variety.

In order to screen hybrid rice varieties with strong drought adaptability suitable for the Xinping area of Yunnan Province, this research selected 14 hybrid rice varieties, including Dianheyou 34, Dianheyou 55, and Dianheyou 56, for field display comparative experiments. The results showed that varieties Dianheyou 56, Yunjing 39, Dianheyou 615, Dianheyou 55, Dianheyou 34, and Dianza 31 could mature normally, while the other 8 hybrid rice varieties did not tassel. Among the six normally mature varieties, Dianheyou 56, Yunjing 39, and Dianheyou 615 had a moderate growth period, good resistance, coordinated yield composition, and high yield. They had good adaptability to drought and could be promoted and planted as drought hybrid rice varieties in the research region.