渭干河灌区中低产棉田变高产栽培技术集成与示范推广

该项目在高产栽培模式上,针对盐渍土的特点,总结出了“四早、两防、三促、多控、一彻底、抓盖顶”的田间管理模式;在施肥体系上,研究“棉田N、P养份空间分布与变异”、“棉花高产N、P、K效应”、“新和县棉田土壤营养障碍”、“锰、锌对棉花的效应与机理”、“氮肥对棉花生产效应与营养诊断”等确定了棉花高产肥料配比和最佳施用量,并初步建立了棉花植株-土壤硝态氮速测诊断指标;生产出棉花长效专用肥,比常规施肥增产9.82%,而且节省投入成本;通过改进现行棉花灌溉制度,灌水量减少20%,产量增加12%;筛选出中棉35、石远321、秦远93089等高产抗病优质品种;创造了棉花害虫生态防治技术体系

Determination of the number of ψ(3686) events taken at BESIII

The number of ψ(3686) events collected by the BESIII detector during the 2021 run period is determined to be (2259.3±11.1)×106 by counting inclusive ψ(3686) hadronic events. The uncertainty is systematic and the statistical uncertainty is negligible. Meanwhile, the numbers of ψ(3686) events collected during the 2009 and 2012 run periods are updated to be (107.7±0.6)×106 and (345.4±2.6)×106, respectively. Both numbers are consistent with the previous measurements within one standard deviation. The total number of ψ(3686) events in the three data samples is (2712.4±14.3)×10^