菠萝老茎留苗地间种甘蔗技术研究

以摘果后的常规菠萝老茎留苗地为试验地，以菠萝老茎留苗与甘蔗种进行间种，探讨和研究不同间种规格和方法对菠萝老茎所留种苗数量、质量(种苗合格率)以及甘蔗产量的影响，并与常规技术的经济指标做了对比分析。结果表明：采用菠萝老茎留苗地间种甘蔗技术，以菠萝大行距间为种植沟，实施隔行间种甘蔗，该技术能使老茎留苗地菠萝留苗平均可达12.81万株/hm2，种苗合格率占94.8%，平均可产甘蔗种 31.95 t/hm2；以菠萝大行距间为种植沟，实施连行间种甘蔗技术，菠萝种苗留苗的数量相对减少，种苗合格率占93.6%，平均每公顷可摘种苗8.30万株，平均可产甘蔗种42.00 t/ hm2。菠萝种苗数减少，但甘蔗产量增加。两种不同的间种规格和方法对留苗和砍种都有各自的效果，与常规菠萝老茎留苗技术相比，菠萝老茎留苗与甘蔗种间种技术总体经济效益显著。

Intercropping Technique for Sugarcane in Pineapple Fields

Experiments were made on intercropping of sugarcane in postharvest pineapple fields to study the effects of different intercropping patterns and methods on quantity and quality of old pineapple breeding plants and sugarcane yield, and to compare the economic indexes with the conventional technique. The results showed that an average of 128 100 old pineapple breeding plants were obtained from a hectare of the field, the qualified breeding plant rate was 94.8%, and 31.95 tons of breeding sugarcane were obtained averagely using the technique with big intercropping space. And 83 000 old pineapple breeding plants were obtained from a hectare of the field, the qualified breeding plant rate was 93.6%, and 42 tons of breeding sugarcane were obtained averagely using the technique with narrow intercropping space. The two different intercropping patterns had different results, but both increased significantly the economic benefit compared to the conventional technique.