水稻什么时候施穗肥?

亿万先生生007

In the past few days, many friends have asked me about the platform. When will the ear fertilizer be applied? Below I will share with you the platform:

At the beginning of July, rice is at the end of effective tillering - early stage of jointing. At this time, the focus of field management is to control the ineffective tillering, promote the growth of effective tillers, and provide a good growth basis for rice panicles.

(1) Controlling invalid clubs

The tiller of rice only begins to root when it grows the third leaf, and it can live independently without relying on the mother stem. Therefore, before the jointing, the new tiller must reach at least 3 leaves to safely become the ear, and for the less than 3 leaves, the tillers are Ineffective tillering, should control its growth, and supply all nutrients to effective tillers. The following methods can be used to control invalid scores:

1. If the growth is too strong, the leaves are dark green and black, and the main stems and the number of tillers per square meter of rice reach 450 or more, and the fields are drained in time to control the ineffective tillers. Sunshine standard: The soil surface produces small cracks, and the color of the rice seedlings is obviously lightened. Generally, it is suitable for drying for about one week.

2. For plots with long potential differences and insufficient tillers, deep irrigation control is ineffective.

(2) Applying panicle fertilizer in time

This year, the whole province, the rice transplanting late, the number of tillers is less than in previous years, in order to speed up the growth of seedlings, many farmers over-application of nitrogen fertilizer, the application of nitrogen fertilizer is concentrated in the tillering stage, it is likely that the emergence of spikes, maturity decline, according to this In the case, it is recommended to apply appropriate nitrogen and potassium fertilizers according to factors such as changes in leaf color and pre-fertilization.

1. The role of panicle fertilizer

Applying panicle fertilizer can promote the formation of large ears, regulate the nitrogen and potassium contents of leaves, increase photosynthesis, extend the functional period of leaves, and increase 1000-grain weight. Get high yields. When the rice is booting, if it can combine pest control and disease prevention.

2. The period of application of panicle fertilizer

xx根据叶龄判断,当第二叶叶到第二叶的后半部分时,11种叶,12叶和13叶水稻品种,是施用穗肥的最佳时间。耳朵的施加时间也可以通过耳朵的方法来确定。拉出主杆,看主杆中的启动杆长度达到0.2-1厘米。对于11~12叶的品种,其中大部分在7月2日至10日施用穗肥,并拔出主茎上的茎叶。如果幼小的耳朵形成,年轻的耳朵覆盖的叶子是旗叶,其上覆盖着旗叶。刀片是倒置的两片叶子。确定大多数倒置的2叶将能够施用穗肥。

?3。施肥量

开肥,一般每公顷60公斤氯化钾。根据增长潜力,每公顷可添加100-120千克尿素(含2千克硫酸铵,可替代1千克尿素),或者可以使用60千克尿素,加入100千克硫酸铵,并加入200千克氯化钾。 >

提示:

1过度生长的稻田和高产水稻花和黑米每公顷可施用200千克氯化钾,氮肥很少或不含氮肥。

2对于更好的稻田,每公顷可施用200千克氯化钾和100千克尿素。

3具有较大潜在差异的稻田每公顷可施用100-150千克钾肥,并可添加60千克尿素和100千克硫酸铵。

4如果施用肥料,有必要观察水稻幼苗的生长并适当减少氮肥的用量。

5在穗生长前将水层设置为3至5厘米,并在提取肥料后保持水5-7天。

6当你在田间时,你应该根据你的土壤质量和田间水稻幼苗的生长以及天气来确定田地的强度和时间。