Impact of Climate Change on Crops
As an impact paper (Cuijing, 2011) resulted that grown temperature effects on the net crop revenue. When the temperature increase 1°C, the total revenue of wheat in China would reduce 1.5% to 5.4%. ( You et al, 2005)
For example, the net crop revenue of season rice in Huazhong Area reduces 0.003% when the monthly sunshine time increases per 10 hours. In Northwest Area and Hua’nan Area increases 0.0030% to 0.0047%.
Net revenue of Winter wheat increases 0.03% in Hua’nan Area when the monthly sunshine time increases per 10 hours, influence is relative, net revenue reduces 0.09% in Huazhong Area and reduces 0.03% in Northwest Area.
Corn shows the same result, when the monthly sunshine time increase 10 hours, the net revenue increase 0.03% in Huazhong, Northwest and Northeast, reduces 0.01% in Hua’nan Area.
Causes Factor to Crops
Sunborn on Your Crops, Flowers and Fruits
Farmers loss money due to the hot climate every year. In South Africa, 20% of ‘Golden Delicious Apple” and 40% of “Granny Smith Apple” were damaged to browning or necrosis on the surface that not be exported and sale. ( Engela Duvenage, 2014 )
In China, for example in Hangzhou, tea, hickory nuts and lotus are yield significantly less than last year due to high temperatures and strong storms. ( Xu Wenwen, 2014 ) When the temperature is over 35°C, the young tea bushes will get burned.
North America and Latin America are no escape from the sunblock. 40% of apples, such like Fuji, Braeburn and Cripps Pink can account for losses due to sunburn. In Chile, farmers loss about 13.5% of coprs and $100 million dollars every year. ( Dr.Jose Antonio Yuri )
UV (ultraviolet) radiation was responsible for the symptoms.
Types of Sunburn
Three types of sunburn have been identified in apples.( Schrader et al. 2011) Sunburn Necrosis results from high fruit surface temperature alone and appears as a necrotic spot on the sun-exposed part of fruit on the tree. ( Graeme Thomson, 2014 )
Sunburn Browning, is caused by joint exposure to high fruit surface temperatures (46C to 49C, depending on cultivar) and ultraviolet-B but does not result in cell death.
Photo-oxidative Sunburn, requires visible light and affects shaded apples that are suddenly exposed to solar radiation. Initially affected areas of the skin appear bleached and later become necrotic.
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