白磷肥在花椰菜上的肥效表现及应用前景

白磷肥是一种新的磷肥品种。在灰红泥土上进行花椰菜肥效试验 ,在等磷量下 ,施用白磷肥的菜花产量最高 ,比不施磷肥的增产 1 8.7%,与普钙、钙镁磷差异不明显 ,但优于磷酸一铵。白磷肥肥效速缓相济 ,后效期长 ,磷的利用率高、单价低 。

富有特色的磷肥新品种——白磷肥

一、白磷肥性质 白磷肥是一种新的磷肥品种,由磷矿粉经硫酸分解后生成磷酸,再分别与石灰乳Ca（OH）2、磷酸作用而成,化学反应如下: 1.H3PO4+CaO+H2O→CaHPO4·2H2O 磷酸 石灰 磷酸氢钙 2.CaHPO4·2H2O+H3PO4→Ca（H2PO4）2·H2O+H2O 磷酸氢钙 磷酸 磷酸二氢钙 所以蟒牌白磷肥的主要成份为Ca（H2PO4）2·H2O和CaHPO4·2H2O,外观呈灰白色粉末,弱酸牲,不易结块,含有效磷（P2O5）18％以上,其中水溶磷Ca（H2PO4）2·H2O占40％—45％,枸溶性磷CaHPO4·2H2O占55％—60％。

Effects of Phosphate and Lime Application on Growth of Trifolium repens,Chamaecrista rotundifolia and Macroptilium atropurpureum in Red Soils

[Objective] The aim was to research effects of P fertilizer and lime on growth of Trrifolium repens, Chamaecrista rotundifolia and Macroptilium atropur- pureum, to provide references for cultivation of the three plants. [Method] Pot experiments were conducted with Trrifolium repens, Charnaecrista rotundifolia and Macroptilium atropurpureum in 2010 in order to research effects of lime and P fer-tilizer mixture on growth of the plants in southern hilly acidic red soils. [Result] With lime amount fixed, application of P fertilizer would enhance plant height, total tiller number and dry matter. When P fertilizer was not applied, however, plant height of the three plants achieved the peak by lime at 1.4 g/kg which proved best for improvement of acidity of red soils. With P fertilizer at 200 mg/kg was applied, biomass of Trifolium repens and Macroptilium atropurpureum achieved the highest by lime at 2.1 g/kg, but total biomass of Chamaecrista rotundifolia was the highest by lime at 1.4 g/kg. [Conclusion] The research provides references for planting and production of Trifolium repens, Chamaecrista rotundifolia and Macroptilium atropur-pureum in southern hilly regions.

丰海玉科学种田获丰收

今夏,辉县市孟庄镇郑屯村小麦大面积获得丰收。村民丰海玉家承包的1.533亩小麦,共收获925公斤,实现单产603.4公斤。大家问他有什么经验,他说,主要是实行科学种田。选用高产、稳产、抗病、早熟的优良品种"豫麦18——64"。注重投入,施足基肥,除实行深耕细耙玉米秸杆还田外,亩施优质农家肥4500公斤,尿素33公斤,云南白磷肥33公斤,惠满丰2瓶,其中底施1瓶,抽穗期叶面喷施1瓶。适时精量匀播,10月6日采用等行7寸,每亩播量5公斤。及时防治病虫害,3月中旬采用井岗霉素防治纹枯病一次,4月底搞一喷三防一次。