饲用黑麦与高丹草复种栽培技术研究

Study on the Technology of Composite Cultivation of Forage Rye and Sorghum sudanense

2003-2005年在河北省农科院旱作所试验站内对饲用黑麦和高丹草复种栽培技术进行了研究，结果表明两者可以进行上下茬搭配，一年两作，形成了饲用黑麦与高丹草复种栽培种植模式。饲用黑麦刈割一次，高丹草刈割三次，全年共刈割四次，初步形成了河北低平原区能量型青鲜饲草的周年供应生产体系。饲用黑麦与高丹草复种栽培模式与吨粮田相比，生物产量是吨粮田的1．39倍，粗蛋白质产量是吨粮田的2．29倍，光能利用率及能量产出也均有较大幅度的提高；饲用黑麦和高丹草两茬的施肥量为：N550kg／hm摘要：、P2O5 300kg／hm^2、K2O 300kg／hm^2；灌溉较吨粮田节水600m^3／hm^2。

The technology of composite cultivation of forage rye and Sorghum sudanense was studied during 2003 to 2005 in the Dry--land Farming Institute Research Station of Hebei Academy of Agriculture and Forestry Sciences. The results showed that the two types of forage crops were able to rotate growing within a year. Four harvests in a year were implemented for this planting system, once for rye and three for Sorghum sudanense, formed a preliminary year--round fresh grass （energy forage） producing system. Comparatively the forage rye/Sorghum sudanense cultivating system had obvious yielding advantage over the ＂ton--grain farmland＂ cultivating systems--the former biomass and the gross protein output was respectively 1.39 times and 2.29 times of the later, and the light energy using efficiency and the energy out put were also well innovated. The application rate of fertilizer for the forage rye and Sorghum sudanense were ： N 550kg/hm^2, P2 O5 300kg/hm^2 , K2 O 300kg/hm^2; Compared with ＂ton-- grain farmland＂, the irrigation water can be saved by 600m^3/hm^2. The system was a profitable cultivating pattern for year--round good quality fresh forage production and high quality forage supply for the profitable animal husbandry.