不同类型饲用玉米的生长发育规律研究

为掌握不同类型饲用玉米生长发育规律,试验以目前普遍采用的青贮型玉米科多8号和粮饲兼用型玉米陕单310为材料,设置4.8万株/hm2、5.85万株/hm2、6.9万株/hm2、7.95万株/hm2和9.0万株/hm2等5个密度进行生育期、叶面积、干物质积累和植株含水量等性状研究,结果表明:两类型饲用玉米收获期的植株含水量均在60%以上。不同类型品种比较,科多8号生育期较短,单株叶面积大,干物质积累主要集中在吐丝以前,后期植株含水量下降较慢;陕单310的生育期较长,单株叶面积小,干物质积累主要集中在吐丝以后,后期植株含水量下降较快。

Study of growth orderliness on different types of feeding maize

In order to master the growth orderliness of different types of feeding maize,the growth duration and leaf area and dry matter accumulation and water content were studied under five densities(48 000,58 500,69 000,79 500 and 90 000 plants/hm~2) on silage type maize of keduo 8 and foodstuff type maize of shaandan 310 in use at present.It was found that water content of different feeding maize is more than 60% at harvest.Growth duration of keduo 8 is shorter,and single-plant leaf area is big.It's dry matter accumulation is mostly collected before spin,and water content of plant is dropped slowly in growth anaphase.But growth duration of shaandan 310 is longer,and single-plant leaf area is small.Its dry matter accumulation is mostly collected after spin,and water content of plant is dropped rapidly in growth anaphase.