高密度种植对不同绿豆株型品种农艺性状及产量的影响

The Effect on the Agronomic Traits and Yields of Different Plant-Type Mungbean Varieties under High-Density Planting

以直立型辽绿8号、半蔓生型辽绿6号为试验材料,采用随机区组排列,以18.0万株/hm2、24.0万株/hm2和12.0万株/hm2(对照)为3个密度处理,研究高密度种植对不同绿豆株型品种农艺性状及产量的影响。结果表明:辽绿8号直立株型品种随种植密度加大,植株分枝数、荚数、粒数增加,植株根系、叶片、茎秆干物积累增加,种植密度24万株/hm2时最高产量达2 835kg/hm2;辽绿6号半蔓生型品种随种植密度增加,植株荚数、粒数减少,干物积累降低,产量下降;在适宜种植密度18万株/hm2时产量达3 085kg/hm2。但两种株型品种的单株荚长、单荚粒数和百粒重差异不大。绿豆株型品种种植密度产量表现不一,可能是因在干旱半干旱条件下,气候变暖,二氧化碳浓度增高,温度提升,光照充裕,群体生长发育协调,绿豆植株干物质积累增加,提高了产量。

Two mungbean cuhivars Liaolv 8,the upright type of mungbean and Laiolv 6, the sprawl type of mungbean were used as the experimental materials. Seting three treatments： T1：180 thousand plants per hm2 ;T2：240 thousand plants per hm2 ;T3：120 thousand plants per hm2 as CK. The test aimed to improve yields and guide production by increasing planting densities which were not the original ones. The results showed that branch numbers, pods, granules, the dry matter accumulation of plant roots, leaves and stems increased with the increasing planting densities of Liaolv 8, the upright type of mungbean. The highest yields could achieve 2 835kg/hm2 under the planting density of 240 000 plants/hm2. Liaolv 6, the sprawl type of mungbean, its pods, granules, dry matter accumulation and yields decreased with the increasing planting densities. The highest yields of Liaolv 6 could be 3 085kg/ hm2 under the appropriate planting densities of 18 0000 plants/hm2. But the differences between the length of pod.granules in each pod and 100-seed weight were small. Although different plant types of mungbean had different yields, this might due to the warmer climate, the increasemg of carbon dioxide and temperature, adequate sunlight, coordination of group growth and increased dry matter accumulation of mungbean and yields.