不同温度型苜蓿产量和品质的动态分析

根据苜蓿干草产量和品质指标的实测值,用非线性函数模拟和分析了冷、暖型苜蓿的干草产量和品质指标的动态变化。结果表明,冷型苜蓿的干草产量和品质指标(除粗脂肪含量外)均优于暖型苜蓿;在快速生长阶段,冷型苜蓿的平均生长速率较暖型苜蓿高40.7%,其累积生长量在03-28以后开始超过暖型苜蓿,盛花期的产草量比暖型苜蓿高出5.3%;冷型苜蓿的粗蛋白含量从分枝期到结荚期均高于暖型苜蓿,盛花期约高出0.8%;冷型苜蓿的粗纤维含量增速较暖型苜蓿慢,盛花期其粗纤维含量较暖型苜蓿低4.3%;冷型苜蓿的粗脂肪含量05-05(初花期)前高于暖型苜蓿,05-05后反而低于暖型苜蓿4.1%。

The dynamic analysis of dry forage yield and qualita- tive indices for different temperature type alfalfa

Based on the measurement data of dry forage yield and qualitative indices of alfalfa,their dynamic variation was simulated and analyzed by nonlinear function.The result shows that the cold type alfalfa is superior to the warm type alfalfa in dry forage yield and quality except for crude fat content.During rapid growth period,the cumulative growth quantity of cold type alfalfa exceeded warm type alfalfa because mean rate of growth of cold type alfalfa is by 40.7% higher than that of warm type alfalfa.The dry forage yield of cold type alfalfa is by 5.3% than that of warm type alfalfa during full flowering period.The crude protein content of cold type alfalfa is higher than that of warm type alfalfa from branching period to pod forming period and this is by 0.8% higher than that at full flowering period.The increase rate of crude fiber content of cold type alfalfa is lower than that of warm type alfalfa and this is by 4.3% lower than that at full flowering period.Before May 5,the crude fat content of cold type alfalfa is higher than that of warm type alfalfa but then this is by 4.1% lower than that after May 5 (early flowering period).