How to make up for strawberry nitrogen deficiency in greenhouse?
Generally, at the beginning of nitrogen deficiency, the leaves in the peak growth period gradually changed from green to light green, and with the aggravation of nitrogen deficiency, the leaves became yellow, partially scorched and slightly smaller than normal leaves. With the aggravation of nitrogen deficiency, the young leaves became greener. The petiole and calyx of the old leaves are reddish, and the leaves are light or serrated bright red. The soil is barren and without normal fertilization, extensive management, overgrown weeds and easy to lack nitrogen. Control method: apply sufficient base fertilizer to meet the growth characteristics of short and concentrated growth period in spring. If nitrogen deficiency is found, 11.5 kg of ammonium nitrate or 8.5 kg of urea per mu should be applied and irrigated immediately after application. At flowering stage, 0.3% 0.5% urea solution can also be sprayed twice, 50 kg fertilizer spray solution per mu or 0.2% potassium dihydrogen phosphate solution 2 times.
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What to do about strawberry lack of potassium and magnesium in greenhouse
Potassium deficiency: the symptoms of potassium deficiency in strawberries often occur in the newly mature upper leaves. The edges of the leaves are often black, brown and dry, followed by burns, and they also develop to the center between the veins of most leaves, and the old leaves suffer seriously. Light can aggravate leaf burns, so potassium deficiency is often confused with sunburn.
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Occurrence and control of abnormal strawberry fruit in greenhouse
In the process of strawberry planting in greenhouse, the fruit is often too fat or too thin, showing abnormal shapes such as chicken crown, flat and so on. This kind of fruit not only affects the quality of strawberry, but also reduces the commodity value. In order to reduce or even avoid the formation of this kind of abnormal fruit, the author introduces the causes and prevention methods as follows:.
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