硫酸钾镁肥在红黄壤茶园上的应用效果

在红黄壤茶园中,以施用相同氮磷肥为基础,通过增施几种不同品种钾肥对茶树生长状况影响的研究,结果表明:增施硫酸钾镁肥处理对茶树的生长效果最好,与单施氮磷肥处理相比,茶树春梢长度和着叶数分别提高了6.23%和11.1%,茶叶叶面积的增大率为11.17%,茶叶的芽头密度和百芽重分别提高28.88%和21.43%,茶叶鲜叶产量增加14.27%。增施硫酸钾肥处理和氯化钾肥处理对茶树的生长也有较明显的促进效果,前者(增施硫酸钾肥处理)对茶树春梢的着叶数、叶面积、芽头密度和茶叶产量的效果较好,而后者(增施氯化钾肥处理)对春梢长、百芽重的增加效果较好。施用45%复合肥处理能比单施氮磷肥处理表现出略为促进茶树生长的效果。增施硫酸钾镁肥比增施45%进口复合肥(农民习惯施肥法)可增加效益3226.5元/hm2,值得在红黄壤区茶叶生产上进一步推广应用。

Effects of Applying Fertilizer of Potassium and Magnesium Sulfate on Tea Planted in Red-yellow Soil

On the base of applying the same doses of nitrogen and phosphor fertilizer, effects of adding some different kinds of fertilizers containing potassium element on tea''s growth in red-yellow soil tea garden were studied in this paper. Results showed that: treatment of adding fertilizer of potassium and magnesium sulfate reached the best result to improve tea''s growth. Compared with the result of applying nitrogen and phosphor fertilizer singly, it could enhance spring branch''s length and leaf''s number by 6.23% and 11.1%, respectively; increase leaf''s area, bud''s density, weight per hundred buds and tea''s yield by 11.17%, 28.88%, 21.43% and 14.27%, respectively. Treatments of adding potassium sulfate or chlorinated potassium could improve tea''s growth obviously, too. The front treatment could enhance leaf''s number, leaf''s area, bud''s density and tea''s yield better. But, the latter treatment could increase the spring branch''s length and weight per hundred buds better. Effect of adding 45% composite fertilizer on tea''s growth was better slightly than that of applying nitrogen and phosphor fertilizer singly. Compared with the treatment of adding 45% composite fertilizer (it is farmer''s usual method of applying fertilizer), treatment of applying fertilizer of potassium and magnesium sulfate could gain more benefit by RMB 3226.5yuan / hm2, so it should be more popularly applied in red-yellow soil tea garden in future.