云南温带地区放牧草地长期维持施肥量的研究

STUDY ON FERTILLZER APPLICATION ROF LONG-TERM MAINTENANCE OF LEGUME PASTURES IN TEMPERATE AREAS OF YUNNAN PROVINCE

在全天候放牧制度、分区轮牧的放牧方式下,通过施用不同肥量即不施任何肥(O)、低施肥量(L)、中施肥量(M)、与高施肥量(H)的维持肥后,观察牧草产量动态,草地养分变化情况以及肥料投入与产出之间的效应,从而提出初步的经济维持施肥量。

This paper reported the trials of fertilizer applying rates under the full grazing and hereafter rotating grazing conditions.The treatments included nil fertilizer,the low,medium and high fertilizer.The results showed that maintenance fertilizers affected pasture persistence especially when high and medium fertilizer rates were used.Both the high and the medium fertilizer rates used also showed the higher economic benifits.the pasture yield and precipitations are positively correlated.Soil pH is apparently improved to a cer- tain extent after the application of Ca—Mg—P(Calcium Magnesium Protactinium).