Enhancing the productivity of irrigated Bt cotton (Gossypium hirsutum) by transplanting technique and planting geometry
Enhancing the productivity of irrigated Bt cotton (Gossypium hirsutum) by transplanting technique and planting geometry
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发表时间：
2011
影响因子：
0.4
通讯作者：
S. Salakinkop
中科院分区：
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作者：
S. Salakinkop
2007-09 年期间，在卡纳塔克邦 Bheemarayanagudi 农业研究站的上克里希纳项目指挥区进行了一项田间试验，以研究 Bt 棉花 (Gossypium hirsutum L.) 在不同种植几何形状下的移栽和点播方法下的比较性能。苗木移栽获得的籽棉产量（3.86 至 4.26 吨/公顷）明显高于农民点播的做法（3.27 吨/公顷）。与点播相比，移栽使棉花产量增加 17% 至 25%，净收益增加 12% 至 32%。通过移栽可以提高 Bt 棉花在正常和延迟播种条件下的潜在产量，从而实现更好的定植、提早活力、提早开花和增加产量特性。与点滴棉花 (19%) 相比，移植 Bt 棉花的叶子变红现象减少了 (7.8% 至 9.2%)。移栽几何中，90cm×90cm行距籽棉产量最高，与120cm×90cm和120cm×60cm行距相当。不同移栽几何的丛轴分枝、棉铃/株、铃重等产量指标均显着高于农户手工点播。 90厘米×90厘米、120厘米×90厘米和120厘米×60厘米几何形状的移栽在产量构成和产量方面彼此相当，但优于其他移栽行距和手工点播做法。
A field experiment was conducted during 2007–09 in Upper Krishna Project command area at Agricultural Research Station, Bheemarayanagudi, Karnataka to study the comparative performance of Bt-cotton (Gossypium hirsutum L.) under in transplanting and dibbling methods at different planting geometry. Significantly higher seed cotton yield was obtained from the transplanting of seedlings (3.86 to 4.26 tonnes/ha) than the farmers’ practice of dibbling (3.27 tonnes/ ha).Transplanting increased the cotton yield by 17 to 25% and net returns by 12 to 32% compared to dibbling. Potential yield of Bt cotton both under normal and delayed sowing conditions could be enhanced by transplanting which resulted in better establishment, early vigour, early flowering and increased yield attributes. Leaf reddening in transplanted Bt cotton was reduced (7.8 to 9.2%) compared to dibbled cotton (19%). Among the transplanting geometry, spacing of 90cm×90cm recorded the highest seed cotton yield and it was at par with spacing’s of 120cm×90cm and 120cm×60cm.Yield attributes, like sympodial branches, bolls/plant, and boll weight were significantly higher in different transplanting geometry than in farmer’s practice of hand dibbling. Transplanting at 90cm×90cm, 120cm×90cm and 120cm×60cm geometries were at par with each other in respect of yield components and yield, but superior over the other transplanting spacings and hand dibbling practice.