播量和行距对新疆高寒旱区燕麦生长及品质的影响OA

To identify the optimal combination of sowing rate and row spacing for oat(Avena sativa)production in the alpine arid and semi-arid regions of Xinjiang,a field experiment was conducted using a two-factor randomized complete block design.The cultivar Longyan 5 was used as the experimental mate-rial,with four:150 kg/hm2(S1),180 kg/hm2(S2),225 kg/hm2(S3),and 270 kg/hm2(S4),and two row spacings treatments:15 cm(L1)and 30 cm(L2).The effects of different sowing rate and row spacing com-binations on the growth,forage yield,and nutritional quality were evaluated using correlation analysis and principal component analysis.The results showed that the interaction between sowing rate and row spacing had highly significant effects on plant height,stem diameter,number of effective tillers,and leaf-stem ratio among the eight treatment combinations(P<0.01).When maximizing fresh forage yield was the primary object,the S2L1 treatment produced the highest fresh yield,reaching 82 340 kg/hm².For the coordinated improvement of yield and quality,the S2L2 treatment exhibited the best overall performance,with fresh forage yield,crude protein content,and relative forage quality reaching 81 986.67 kg/hm²,11.26%,and 104.11,respectively.Correlation analysis revealed that stem diameter and fresh forage yield were extremely significant positive correlation with crude protein content and relative forage quality(P<0.01).Principal component analysis further showed that S2L2,corresponding to a sowing rate of 180 kg/hm2 and a row spacing of 30 cm,achieved the highest comprehensive score and was therefore identified as the optimal combination for high yield and high-quality oat production in the study area.These findings provide a theo-retical basis and technical support for optimizing oat cultivation practices and ensuring forage supply for ani-mal husbandry in the alpine arid and semi-arid regions of Xinjiang.