水稻控灌特性及最佳密度试验研究

为研究控灌条件下的水稻合理密度 ,探求最佳栽插密度模式 ,连续 3年在江苏省东台市一0 .3 4hm2 试验区内开展水稻控灌特性及最佳密度试验 .试验结果表明 :水稻控灌可以节约灌水量5 5 .7%～ 61 .7% ,增产幅度 7.8%～ 9.2 % ,并具有扎根深、有效分蘖高、茎杆粗壮、抗倒伏等优点 ;水稻在相同的控灌条件下最佳密度为 3 7.5万穴 /hm2 ,栽插株距 1 0 .0cm ,行距 2 6.6cm ,增产幅度3 .3 %～ 6.9% .

Experimental study on characteristics of rice irrigation control and the most suitable density for rice planting

A 3 years' experiment for research of the characteristics of rice irrigation control and the most suitable density of rice planting has been performed in an experimental region of 0.34hm 2 in Dongtai City, Jiangsu Province. The results show that the irrigation control can save 55.7%～61.7% water consumption in irrigation, and increase rice yield by 7.8%～9.2%, and that the rice planted with the technique has the merits of deep rooting, high tillering, strong branches, and strong resistance to lodging. Besides, the most suitable values for rice planting are obtained: the density is 37.5×10 4 caves/hm 2, spacing in the rows 10.0cm, and row spacing 26.6cm, which may bring about an increase of rice yield of 2.2%～6.2%.