Demonstration of the introduction and application evaluation of Pennisetum gigan-teum in Xizang
In order to accelerate the high-quality development of grassland animal husbandry in Shigatse,gradually solve the outstanding problems of grass-livestock contradictions,and reduce the pressure on natural grasslands,the introduction experiment of Pennisetum giganteum was carried out..In the experiment,four 28m×28m plots were di-vided in the uniform test plot to carry out repeated experiments,and the growth traits such as plant height and leaf width and the yield traits such as fresh grass yield and hay yield of of P.giganteum were measured after two mowings by recording the growth period and overwintering conditions of P.giganteum in Nanmulin County,Shigatse City.The results showed that:(1)The average height of the introduced P.giganteum in the first mowing was 102.00 cm,which was significantly lower than that of the second mowing(105.75 cm).The leaf width was 3.65cm at the first mowing and 3.53cm at the second mowing,and there was no significant difference between the two.(2)The total hay yield of the P.giganteum after two mowings was 4922.69 kg·hm-2,of which 2530.35 kg·hm-2 was mowed for the first time and 2392.34 kg·hm-2 for the second mowing.(3)The overwintering rate of P.giganteum was zero,which could not survive the winter in Nanmulin County,Shigatse.This became a technical bottleneck for promotion,and further sys-tematic cultivation experiments were needed.
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