甘薯切块直播栽培是一项新栽培方式，它革新了传统栽培法。其增产机理是加长了甘薯生长期并充分利用了早春光热资源和地力贡献，比传统栽秧具有个体发育早、群体生长迅速的优势，其叶面积指数、蒸腾速率、叶部细胞间隙ＣＯ２浓度、净光合速率、净光合能力、光合势等生理指标均有大幅度提高，为甘薯增产增收奠定了良好的生理基础

<正> 硅肥是一种富含有效硅及钙、镁和多种微量元素的肥料,且成本低廉,施用方便,在水稻、甘薯、大蒜、生姜、苹果等作物上具有良好的增产效果,但硅肥施于桑树未见有研究报道。1993年、1994年我们连续二年将硅肥施于夏秋砍伐桑田,进行增产效果的试验,获得了较理想的增产效果。

The study deals with the spraying application benefit of RE with different concentration times and in different growing period of wheat. Suitable amount of RE application canstimulate the growth of wheat, increase effective ear numbers, grains per ear and1000-grains weight. The results of spraying application of RE in different growth periodarea jointing period > flowering period> tillering period (before winter), the results of spraying aPPlication of RE with different concentration are: 0. 1 % >0. 15% >0.05%(ChangleYizhisu, 750kg liguid / hm2), the results of spraying application of times of increasing yieldare: 3 times> 2 times>1 time. The results showed that mdium-fertile soil with irrigationcondition, the yields of winter wheat increase 15% approximately, when 750 kg liguid of0. 1% RE were spraying application per hm2.

<正> 甘薯新法栽培技术是一项投资少、收效大的综合性甘薯丰产栽培技术,将薯种切块、防腐后直接播于大田,配以覆膜、清棵等措施,经莱芜、泰安、滕州等地多年试验示范,在中、