作物施硫生态效应研究

Research of Ecological Effects on Crops Fertilized with Sulfur

通过田间试验和盆栽试验研究了小白菜和油菜在不同的土壤类型、肥料品种和不同施肥量条件下的生态效应 ,结果表明施用硫肥能促进作物生长、提高其干重生物量和含硫量 ,但施用石膏效果更佳 ,并随施肥量增加 ,效果也增强。盆栽试验中 ,同一处理油菜干重生物量和含硫量都表现为黄棕壤 >红壤 >灰潮土。施用单质硫能提高土壤中的有效硫 ,有利于改变土壤缺硫状况。缺硫土壤中油菜表现出花期延迟、花粉粒发育不全等。

Through field experiment and pot trial, ecological effects of fertilization on cabbage and rape were studied in different types of soil, fertilizers and sulfur fertilizer amount. The results indicated sulfur could promote crops to grow , increase their dry weight and sulfur content. The best effect was given by application of gypsum and the efficiency increased with raising sulfur fertilizer amount. To the same treatment in pot trial ,dry weight and sulfur content of rape were observed in the sequence: Yellow Brown soil>Red soil>Grey Cultivated Meadow soil. Fertilizing with element sulfur improved soil available sulfur which was beneficial in mitigation of sulfur deficiency of soils. Sulfur deficiency in soils could induce a delayed blooming stage and poor developed pollen grains.