不同橡胶园类型间作珠芽魔芋的种植密度

为建立适宜的橡胶园间作模式,探索珠芽魔芋(Amorphophallus bulbifer)胶园间作的最佳密度,笔者研究了在常规和宽窄行胶园中珠芽魔芋种植密度对珠芽魔芋的叶形态指标、叶面球茎数量及植株倒伏率、地下球茎的氮磷钾积累量及产量、品质的影响.结果表明,宽窄行比常规胶园更适合珠芽魔芋间作;宽窄行胶园、常规胶园的适宜...

Planting density of Amorphophallus bulbifer intercropped in different planting systems of rubber plantations

In order to establish an appropriate intercropping pattern and explore the suitable intercropping density of Amorphophallus bulbifer in rubber plantations, Amorphophallus bulbifer was planted as an intercrop at different densities in conventional and paired row rubber plantations to observe the effects of planting density of A. bulbifer on leaf morphological indexes, the number of bulbils of the leaves and plant lodging rate, the contents of nitrogen, phosphorus and potassium in corms, yield and quality of the corms in the rubber plantations. The results showed that the paired row rubber plantation was more suitable for intercropping with A. bulbifer than conventional rubber plantation, and that the suitable planting densities of A. bulbifer intercropped in the rubber plantations were 40020 and 33345 plants/ha, respectively. Planting systems of the rubber plantations had a greater effect on the growth of the intercrop A. bulbifer than the planting density of the intercrop. The planting density of the intercrop in the conventional rubber plantation had no significant effect on the leaf morphological index, and the corm yield and quality, but its effects on the nitrogen, phosphorus and potassium content and absorption varied with the change of planting density of the intercrop in the conventional rubber plantation. In the paired row rubber plantation, the lower the planting density, the shorter the plant, the thicker the petiole, the larger the leaf disc, the more the number of bulbils of the leaves, and the stronger the plant lodging resistance. In the paired row rubber plantation, the plant was shorter with thicker petiole, and was higher in propagation coefficient of the bulbils of the leaves, plant lodging resistance, corm enlargement coefficient, weight of single corm, and corm yield and quality, while the contents of N, P and K in corms were decreased but with slightly higher absorption, as compared to those in the conventional rubber plantation. These results showed that intercropping of A. bulbifer is much better in the paired row rubber plantation than in the conventional rubber plantation, which is more conducive to improvement of corm yield and quality, lodging resistance, and propagation of bulbils of the leaves of A. bulbifer.