高产冬小麦硫素营养特性的研究

Study on the Characteristics of Sulphur Nutrition by High-yield winter wheat

在田间条件下，冬小麦（丰抗１５）地上部硫百分含量的最大值在孕穗期，施硫处理为０．４０６％，对照为０．３６４％；最大累积量在灌浆期，施硫处理与对照分别为１０．９１８ｍｇ·株－１和１０．６６７ｍｇ·株－１；最大吸收强度在拔节至孕穗期间，两处理皆在０．４０ｍｇ·株－１·ｄ－１左右。施用硫肥可提高冬小麦的籽粒产量。形成百公斤籽粒需吸硫０．１５４ｋｇ～０．２２２ｋｇ．在拔节后的各生育期，硫素在茎鞘中的分配率高于叶片，生育后期则主要集中于穗部。成熟期穗中硫的含量占总量的比率大于５５％．

Under field condition, the maximum sulphur percentage of above-ground parts of winter wheat was at booting, which is 0. 406% with fertilizing sulphur treatment and 0. 364 % with no-fertilizing sulphur treatment (CK). The highest accumulation amounts of sulphur, appearing at the milk stage, were 10. 918 mg. plant-1 with fertilizing-sulphur and 10. 667 mg. plant-1 with CK. The accumulation rate of sulphur from elongation to booting stage was the highest, which was about 0. 4mgper plant-1a day. The sulpur fertilizers could increase the grain yield of winter wheat. Amounts of sulphur needed for production 100 Kg grain were 0. 154-0. 222 kg. The ratio of sulphur distributing in stem washigher than that in leaves at each stage after elongation, and mainly accumulated in ear atlater stage of growth. More than 55% of total sulphur amount was contained in ear.